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/tailwind-merge/src/lib/tw-join.ts

@@ -0,0 +1,50 @@
+/**
+ * The code in this file is copied from https://github.com/lukeed/clsx and modified to suit the needs of tailwind-merge better.
+ *
+ * Specifically:
+ * - Runtime code from https://github.com/lukeed/clsx/blob/v1.2.1/src/index.js
+ * - TypeScript types from https://github.com/lukeed/clsx/blob/v1.2.1/clsx.d.ts
+ *
+ * Original code has MIT license: Copyright (c) Luke Edwards <luke.edwards05@gmail.com> (lukeed.com)
+ */
+
+export type ClassNameValue = ClassNameArray | string | null | undefined | 0 | 0n | false
+type ClassNameArray = ClassNameValue[]
+
+export function twJoin(...classLists: ClassNameValue[]): string
+export function twJoin() {
+    let index = 0
+    let argument: ClassNameValue
+    let resolvedValue: string
+    let string = ''
+
+    while (index < arguments.length) {
+        if ((argument = arguments[index++])) {
+            if ((resolvedValue = toValue(argument))) {
+                string && (string += ' ')
+                string += resolvedValue
+            }
+        }
+    }
+    return string
+}
+
+const toValue = (mix: ClassNameArray | string) => {
+    if (typeof mix === 'string') {
+        return mix
+    }
+
+    let resolvedValue: string
+    let string = ''
+
+    for (let k = 0; k < mix.length; k++) {
+        if (mix[k]) {
+            if ((resolvedValue = toValue(mix[k] as ClassNameArray | string))) {
+                string && (string += ' ')
+                string += resolvedValue
+            }
+        }
+    }
+
+    return string
+}