[codex] Add Moomoo ML research recorder

[zifanzhou1024]

Summary

• Adds a local-only Moomoo ML research recorder for 0DTE ATM-window option snapshots across SPX, SPY, QQQ, IWM, RUT, and NDX.
• Writes raw-first JSONL under /Users/sakura/local-ml-data/gamma-ml-research, including per-contract rows, per-ticker capture batches, underlying/proxy rows, and capture summaries.
• Adds unified ML join labels: time_utc, time_bucket_utc, and ticker, with compatibility aliases for existing captured_at_utc, timeline_bucket_utc, and symbol naming.
• Adds market-hours recorder scripts, README/docs updates, and tests for raw field preservation and recorder scheduling behavior.

Notes

• The macOS LaunchAgent plist was installed locally at /Users/sakura/Library/LaunchAgents/com.sakura.gammascope.moomoo-research-recorder.plist; that user-local plist is outside this repository and is not part of this PR.
• RUT and NDX still require manual spot values through /Users/sakura/local-ml-data/gamma-ml-research/moomoo-recorder.args or CLI --spot arguments before their option chains are selected.
• The companion GEXBot handoff document is in the separate dealer-flow-lab repository and cannot be included in this GammaScope PR.

Verification

• PYTHONPATH=services/collector:apps/api .venv/bin/pytest services/collector/tests -q -> 177 passed
• node --test tests/package-scripts.test.mjs -> 5 passed
• plutil -lint /Users/sakura/Library/LaunchAgents/com.sakura.gammascope.moomoo-research-recorder.plist
• zsh -n ops/run_moomoo_research_market.sh
• git diff --check