Improve dashboard latency caching

Integrate Old Wang trading strategy overlay

Backup current stock predictor strategies

Apply optimized factor weight overlay

Add daily Hugging Face sync automation

Temporarily skip login and add validation config report

Merge remote-tracking branch 'hf/main' into codex/self-refine-validation-gate

feat: integrate local architecture with HF Space

Filter queue warmup placeholders

Fix HF queue prediction placeholders

feat: add institutional signals and HF-friendly deploy

feat: stock chart image for LINE Bot + new /chart-image endpoint

fix: replace unbounded caches with TTLCache to prevent memory leaks

feat: comprehensive optimization — 30 improvements across ML, perf, frontend, security, architecture