feat: robust metric extraction with confidence score and proof snippets

- fixed Year-Prefix Bug in MetricParser
- added metric_confidence and metric_proof_text to database
- added Entity-Check and Annual-Priority to LLM prompt
- improved UI: added confidence traffic light and mouse-over proof tooltip
- restored missing API endpoints (create, bulk, wiki-override)

company-explorer/frontend/node_modules/postcss-js/index.mjs

@@ -0,0 +1,8 @@
+import index from './index.js'
+
+export default index
+
+export const objectify = index.objectify
+export const parse = index.parse
+export const async = index.async
+export const sync = index.sync