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/supports-preserve-symlinks-flag/.eslintrc

@@ -0,0 +1,14 @@
+{
+	"root": true,
+
+	"extends": "@ljharb",
+
+	"env": {
+		"browser": true,
+		"node": true,
+	},
+
+	"rules": {
+		"id-length": "off",
+	},
+}