[Stack 4/17] Deep analysis of Python-Clojure discrepancies and fix plan

[jucor]

Summary

Documentation-only PR: deep analysis of Python vs Clojure discrepancies and a TDD fix plan.

Changes

• Deep analysis documents (deep-analysis-for-julien/) comparing Python and Clojure implementations statement-by-statement
• Consolidate CLAUDE.md documentation for the delphi project
• Discrepancy fix plan (docs/PLAN_DISCREPANCY_FIXES.md) with prioritized list of fixes

Test plan

• Documentation only — no code changes
  🤖 Generated with Claude Code

Squashed commits

• Adapt agents background and support Gemini
• Add sections
• Add deep analysis of Delphi vs Clojure math pipeline
• Fix inaccuracies found during statement-by-statement verification
• Rename deep analysis folder
• Replace AGENTS.md/GEMINI.md symlinks with proper delphi/CLAUDE.md
• Address Copilot review: fix doc references, move deep-analysis-for-julien into delphi/docs/

commit-id:d2f65026

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Stack:

• [Stack 17/17] Fix K-means k divergence: preserve vote-encounter row order #2524
• [Stack 16/17] Fix D15: match Clojure moderation handling (zero out columns, don't remove) #2523
• [Stack 15/17] Fix D8: match Clojure repful classification (rat > rdt) #2522
• [Stack 14/17] Fix D7: match Clojure repness metric formula (product of 4 signed values) #2521
• [Stack 13/17] Fix D6: match Clojure two-proportion test formula (+1 pseudocount) #2520
• [Stack 12/17] Fix D5: match Clojure prop_test formula (Wilson-score-like with +1 pseudocount) #2519
• [Stack 11/17] Fix D9: z-score thresholds from two-tailed to one-tailed #2518
• [Stack 10/17] Fix test DB connection: use DATABASE_URL with dotenv #2517
• [Stack 9/17] Vectorize participant info computation (3-15x speedup) #2516
• [Stack 8/17] Speed up regression tests #2515
• [Stack 7/17] Fix D4: pseudocount formula #2514
• [Stack 6/17] Fix D2: in-conv participant threshold + D2c vote count source #2513
• [Stack 5/17] Per-discrepancy test infrastructure #2512
• [Stack 4/17] Deep analysis of Python-Clojure discrepancies and fix plan #2511 ⬅
• [Stack 3/17] Speed up CI: replace pip with uv pip in Dockerfile (~2x faster installs) #2510
• [Stack 2/17] Add SKIP_GOLDEN env var to disable golden snapshot tests #2509
• [Stack 1/17] CI: add concurrency group to E2E workflow; run CI on spr/ branches #2508

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⚠️ Part of a stack created by spr. Do not merge manually using the UI - doing so may have unexpected results.