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/lib/value-parser/walk.js

@@ -0,0 +1,16 @@
+"use strict";
+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);
+        }
+    }
+};