refactor(findings): split ALL-FINDINGS.md into per-experiment files

Break the monolithic 3249-line findings file into 29 individual files,
one per experiment. Each file is named YYYY-MM-DD-NN-slug.md for easy
chronological sorting and discovery.

No content changes — purely structural reorganization.

findings/README.md

@@ -0,0 +1,16 @@
+# Model Findings — Analytical & Research Work
+
+_Tracking what actually works (and doesn't) when using AI models for research,
+analysis, bias detection, and document review — not coding._
+
+Started: 2026-04-26
+
+## Context
+
+We use multiple models in different roles: Claude Code (Opus/Sonnet) for
+generation, Sonnet + GPT-5 for independent dual review, smaller models for
+focused analytical tasks. Most public discussion is about coding. We found
+almost no published methodology for using models in analytical research tasks
+(searched 2026-04-26). That gap is why we're tracking this.
+
+Each experiment lives in its own file. See individual finding files below.