chore: release v0.28.0

[github-actions]

🤖 New release

• timely_bytes: 0.27.0 -> 0.28.0 (✓ API compatible changes)
• timely_container: 0.27.0 -> 0.28.0
• timely_logging: 0.27.0 -> 0.28.0
• timely_communication: 0.27.0 -> 0.28.0 (✓ API compatible changes)
• timely: 0.27.0 -> 0.28.0 (⚠ API breaking changes)

⚠ timely breaking changes

--- failure constructible_struct_adds_field: externally-constructible struct adds field ---

Description:
A pub struct constructible with a struct literal has a new pub field. Existing struct literals must be updated to include the new field.
        ref: https://doc.rust-lang.org/reference/expressions/struct-expr.html
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.46.0/src/lints/constructible_struct_adds_field.ron

Failed in:
  field PerOperator.cap_counts in /tmp/.tmpRxtwRG/timely-dataflow/timely/src/progress/reachability.rs:428

--- failure inherent_method_missing: pub method removed or renamed ---

Description:
A publicly-visible method or associated fn is no longer available under its prior name. It may have been renamed or removed entirely.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#item-remove
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.46.0/src/lints/inherent_method_missing.ron

Failed in:
  OperatorBuilder::set_notify, previously in file /tmp/.tmp37F3QQ/timely/src/dataflow/operators/generic/builder_rc.rs:52
  Handle::epoch, previously in file /tmp/.tmp37F3QQ/timely/src/dataflow/operators/core/input.rs:473
  Handle::epoch, previously in file /tmp/.tmp37F3QQ/timely/src/dataflow/operators/core/input.rs:473
  OperatorBuilder::set_notify, previously in file /tmp/.tmp37F3QQ/timely/src/dataflow/operators/generic/builder_raw.rs:102
  MutableAntichain::new_bottom, previously in file /tmp/.tmp37F3QQ/timely/src/progress/frontier.rs:447

--- failure struct_pub_field_missing: pub struct's pub field removed or renamed ---

Description:
A publicly-visible struct has at least one public field that is no longer available under its prior name. It may have been renamed or removed entirely.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#item-remove
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.46.0/src/lints/struct_pub_field_missing.ron

Failed in:
  field output_summaries of struct PortInformation, previously in file /tmp/.tmp37F3QQ/timely/src/progress/reachability.rs:436

--- failure trait_allows_fewer_generic_type_params: trait now allows fewer generic type parameters ---

Description:
A trait now allows fewer generic type parameters than it used to. Uses of this trait that supplied all previously-supported generic types will be broken.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#trait-new-parameter-no-default
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.46.0/src/lints/trait_allows_fewer_generic_type_params.ron

Failed in:
  trait Partition allows 4 -> 2 generic types in /tmp/.tmpRxtwRG/timely-dataflow/timely/src/dataflow/operators/vec/partition.rs:8
  trait Partition allows 4 -> 2 generic types in /tmp/.tmpRxtwRG/timely-dataflow/timely/src/dataflow/operators/vec/partition.rs:8

--- failure trait_method_added: pub trait method added ---

Description:
A non-sealed public trait added a new method without a default implementation, which breaks downstream implementations of the trait
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#trait-new-item-no-default
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.46.0/src/lints/trait_method_added.ron

Failed in:
  trait method timely::progress::operate::Operate::initialize in file /tmp/.tmpRxtwRG/timely-dataflow/timely/src/progress/operate.rs:56
  trait method timely::progress::Operate::initialize in file /tmp/.tmpRxtwRG/timely-dataflow/timely/src/progress/operate.rs:56

--- failure trait_method_default_impl_removed: pub trait default method impl removed ---

Description:
A method's default impl in an unsealed trait has been removed, breaking trait implementations that relied on that default
        ref: https://doc.rust-lang.org/book/ch10-02-traits.html#default-implementations
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.46.0/src/lints/trait_method_default_impl_removed.ron

Failed in:
  trait method timely::progress::operate::Operate::notify_me in file /tmp/.tmpRxtwRG/timely-dataflow/timely/src/progress/operate.rs:63
  trait method timely::progress::Operate::notify_me in file /tmp/.tmpRxtwRG/timely-dataflow/timely/src/progress/operate.rs:63

--- failure trait_method_missing: pub trait method removed or renamed ---

Description:
A trait method is no longer callable, and may have been renamed or removed entirely.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#major-any-change-to-trait-item-signatures
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.46.0/src/lints/trait_method_missing.ron

Failed in:
  method get_internal_summary of trait Operate, previously in file /tmp/.tmp37F3QQ/timely/src/progress/operate.rs:47
  method set_external_summary of trait Operate, previously in file /tmp/.tmp37F3QQ/timely/src/progress/operate.rs:55
  method get_internal_summary of trait Operate, previously in file /tmp/.tmp37F3QQ/timely/src/progress/operate.rs:47
  method set_external_summary of trait Operate, previously in file /tmp/.tmp37F3QQ/timely/src/progress/operate.rs:55

--- failure trait_method_requires_different_generic_type_params: trait method now requires a different number of generic type parameters ---

Description:
A trait method now requires a different number of generic type parameters than it used to. Calls or implementations of this trait method using the previous number of generic types will be broken.
        ref: https://doc.rust-lang.org/reference/items/generics.html
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.46.0/src/lints/trait_method_requires_different_generic_type_params.ron

Failed in:
  Partition::partition (0 -> 2 generic types) in /tmp/.tmpRxtwRG/timely-dataflow/timely/src/dataflow/operators/vec/partition.rs:24
  Partition::partition (0 -> 2 generic types) in /tmp/.tmpRxtwRG/timely-dataflow/timely/src/dataflow/operators/vec/partition.rs:24

--- failure trait_no_longer_dyn_compatible: trait no longer dyn compatible ---

Description:
Trait is no longer dyn compatible, which breaks `dyn Trait` usage.
        ref: https://doc.rust-lang.org/stable/reference/items/traits.html#object-safety
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.46.0/src/lints/trait_no_longer_dyn_compatible.ron

Failed in:
  trait Partition in file /tmp/.tmpRxtwRG/timely-dataflow/timely/src/dataflow/operators/vec/partition.rs:8
  trait Partition in file /tmp/.tmpRxtwRG/timely-dataflow/timely/src/dataflow/operators/vec/partition.rs:8

--- failure trait_removed_supertrait: supertrait removed or renamed ---

Description:
A supertrait was removed from a trait. Users of the trait can no longer assume it can also be used like its supertrait.
        ref: https://doc.rust-lang.org/reference/items/traits.html#supertraits
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.46.0/src/lints/trait_removed_supertrait.ron

Failed in:
  supertrait timely::scheduling::Schedule of trait Operate in file /tmp/.tmpRxtwRG/timely-dataflow/timely/src/progress/operate.rs:16
  supertrait timely::scheduling::Schedule of trait Operate in file /tmp/.tmpRxtwRG/timely-dataflow/timely/src/progress/operate.rs:16

Changelog

timely

0.28.0 - 2026-03-13

Other

• Convert Tracker structs to columnar (#762)
• Demonstrate lazy scheduling (#754)
• More work on Add bug audit and API consistency analysis #757 (#759)
• Partial progress on Add bug audit and API consistency analysis #757 (#758)
• Convert Operate to a builder trait (#756)
• Remove set_external_summary (#592)

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This PR was generated with release-plz.