Bug fixes, test improvements

[devinslick]

Key changes:

• Add decrypt_data_blob_async() to prevent event loop blocking
• Export Location, PhotoResult, RateLimitError from package root
• Remove dead code (_parse_location_blob function)
• Remove unused get_history start/end parameters
• Fix lock message sanitization to re-collapse spaces after removing chars
• Add docstrings to helper functions
• Remove placeholder comment from helpers.py

Test improvements:

• Add test for async decryption method
• Add test for empty sanitized lock message
• Update test for removed _parse_location_blob
• Achieve 100% branch coverage

[Copilot]

Pull request overview

This pull request makes several bug fixes and test improvements to achieve 100% branch coverage, while also adding new async functionality and improving API exports for better discoverability.

Changes:

• Added decrypt_data_blob_async() method to prevent event loop blocking in async contexts
• Exported Location, PhotoResult, and RateLimitError from package root for better API discoverability
• Fixed lock message sanitization to properly handle messages containing only special characters
• Removed dead code (_parse_location_blob() function) and unused parameters (start/end from get_history())
• Added comprehensive docstrings with exception documentation to all public API methods

Reviewed changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
fmd_api/client.py	Added decrypt_data_blob_async() method with executor-based async wrapper; added comprehensive docstrings with Raises sections for all public API methods
fmd_api/device.py	Removed unused _parse_location_blob() function; simplified get_history() by removing unused start/end parameters; fixed lock message sanitization to re-collapse whitespace after character removal
fmd_api/init.py	Added Location, PhotoResult, and RateLimitError to package exports
fmd_api/helpers.py	Added docstrings to helper functions; removed placeholder comment
fmd_api/_version.py	Updated version to 2.0.8
pyproject.toml	Updated version to 2.0.8
tests/unit/test_lock_message.py	Added test for lock messages containing only special characters
tests/unit/test_coverage_improvements.py	Added test for async decryption method; removed obsolete test for deleted _parse_location_blob function
CHANGELOG.md	Added new CHANGELOG following Keep a Changelog format with full release history
docs/HOME_ASSISTANT_REVIEW.md	Updated status for completed Home Assistant integration improvements

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