Fix profiler initialization bug and implement Redis persistence for minified content

[Copilot]

Addresses code quality issues and completes missing functionality in FPC cache implementations.

Critical Fixes

FPC.go profiler logic: Inverted condition prevented profiler from ever starting

- if (false == config.EnableProfile) {
+ if config.EnableProfile {
    initProfiler(config)
}

FPC.js minified content persistence: Implemented TODO to save minified HTML back to Redis, preventing redundant minification on subsequent cache hits

• Added compressToGzippedBase64() to match Redis storage format
• Added setRedisValue() with error handling
• Async background save after minification completes

Code Cleanup

• Removed duplicate blank import _ "encoding/json" in FPC.go
• Removed commented-out gunzipSync import in FPC.js
• Enhanced logging to include cache key in Redis save operations

Original prompt

Check improvements

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