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/node-releases/README.md

@@ -0,0 +1,12 @@
+# Node.js releases data
+
+All data is located in `data` directory.
+
+`data/processed` contains `envs.json` with node.js releases data preprocessed to be used by [Browserslist](https://github.com/ai/browserslist) and other projects. Each version in this file contains only necessary info: version, release date, LTS flag/name, and security flag.
+
+`data/release-schedule` contains `release-schedule.json` with node.js releases date and end of life date.
+
+## Installation
+```bash
+npm install node-releases
+```