docs(bench): add PR #73, #80, and #87 experiment results

[jack-arturo]

Summary

• Adds evaluation results from the initial experiment round to benchmarks/EXPERIMENT_LOG.md
• recall: Add minimum relevance score threshold to filter low-quality results #73 min_score threshold: neutral (needs consolidation: Decay running but not affecting recall — archive/delete thresholds disabled, relevance approaching zero #78 for score differentiation first)
• PR feat: enhanced recall — BM25 search, LLM reranking, query expansion #80 enhanced recall: blocked by merge conflicts with main, needs rebase
• PR feat: write-time dedup gate (ADD/UPDATE/SUPERSEDE/NOOP) #87 write-time dedup: neutral on recall (expected — dedup is a write-path change)

Test plan

• No code changes, documentation only

Made with Cursor

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

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Review profile: CHILL

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📥 Commits

Reviewing files that changed from the base of the PR and between e52fdc3 and 331631f.

📒 Files selected for processing (1)

• benchmarks/EXPERIMENT_LOG.md

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📝 Walkthrough

Summary by CodeRabbit

• Documentation
  • Updated experiment log with three new benchmark result entries documenting performance metrics and experimental outcomes from recent optimization iterations.

Walkthrough

Three new experimental benchmark results were added to the experiment log for 2026-03-02, documenting performance metrics for three separate pull requests including a min-score threshold optimization, an enhanced-recall feature (blocked due to merge conflicts), and a write-time deduplication gate.

Changes

Cohort / File(s)	Summary
Experiment Log benchmarks/EXPERIMENT_LOG.md	Added three new benchmark result entries for PR #73, #80, and #87, documenting performance scores, branch names, and notes on implementation status and dependencies.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch docs/experiment-log-updates

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