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/sync.js

@@ -0,0 +1,12 @@
+let postcss = require('postcss')
+
+let parse = require('./parser')
+let processResult = require('./process-result')
+
+module.exports = function (plugins) {
+  let processor = postcss(plugins)
+  return input => {
+    let result = processor.process(input, { parser: parse, from: undefined })
+    return processResult(result)
+  }
+}