chore: establish clean v0.2 baseline

Include only the working reconstruction prototype with Ollama integration:
- double-wrapping fix (lib/llm/provider.js)
- explicit v0.2 JSON output schema (prompts/reconstruct-v0.2.md)
- Zod validation layer (lib/reconstruction/schema.js)
- shared core analysis path (lib/analysis.js)
- prompt versioning infrastructure (lib/reconstruction/prompt.js)
- provider abstraction
- functioning Ollama provider path
- updated API route with centralized analysis
- UI components displaying v0.2 data and validation errors
- .gitignore rules for generated evaluation artifacts

Exclude: evaluator experiments, diagnostic tests, debug scripts,
generated artifacts, comparison findings, test data tied to evaluator.

.gitignore

@@ -34,3 +34,8 @@ Thumbs.db
 npm-debug.log*
 yarn-debug.log*
 yarn-error.log*
+
+# Generated evaluation artifacts (regenerated each run)
+evaluation-results/
+provider-debug-results/
+tests-results/