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.

package.json

@@ -1,7 +1,7 @@
 {
   "type": "module",
   "name": "confidence-engine",
-  "version": "0.1.0",
+  "version": "0.2.0-experimental",
   "private": true,
   "description": "Experimental prototype for evidence-based situation reconstruction using local LLMs",
   "scripts": {