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/tailwindcss/src/value-parser/walk.js

@@ -0,0 +1,18 @@
+module.exports = function walk(nodes, cb, bubble) {
+  var i, max, node, result
+
+  for (i = 0, max = nodes.length; i < max; i += 1) {
+    node = nodes[i]
+    if (!bubble) {
+      result = cb(node, i, nodes)
+    }
+
+    if (result !== false && node.type === 'function' && Array.isArray(node.nodes)) {
+      walk(node.nodes, cb, bubble)
+    }
+
+    if (bubble) {
+      cb(node, i, nodes)
+    }
+  }
+}