feat: AI-added records save with placeholders + "Added by AI" provenance

Stop blocking AI imports/proposals on missing non-critical fields. Records
the chat agent drafts now save with safe placeholders, auto-generated file
numbers, and a source="ai" marker that surfaces an "Added by AI" badge so a
clinician can review/edit them later.

Backend:
- add `source` (manual|ai) column to patients/appointments/prescriptions
  (migration 0014) + canonical types, services, validation schemas
- relax patient/appointment validation: empty file number allowed, demographic
  + type/provider/initials fall back to placeholders (initials derived from name)
- patients.generateFileNumber() auto-assigns an MRN when one is missing
- proposeAppointment accepts a name when no file number resolves; AI commits +
  /api/ai/import stamp source="ai"

Frontend:
- `source` on Appointment/Patient/Prescription types; AI commits send source="ai"
- reusable <AiBadge> shown on the Patients table/detail and prescriptions list

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.agents/skills/ai-elements/scripts/stack-trace.tsx

@@ -0,0 +1,58 @@
+"use client";
+
+import {
+  StackTrace,
+  StackTraceActions,
+  StackTraceContent,
+  StackTraceCopyButton,
+  StackTraceError,
+  StackTraceErrorMessage,
+  StackTraceErrorType,
+  StackTraceExpandButton,
+  StackTraceFrames,
+  StackTraceHeader,
+} from "@/components/ai-elements/stack-trace";
+
+const handleFilePathClick = (path: string, line: number, col: number) => {
+  console.log(`Open file: ${path}:${line}:${col}`);
+};
+
+const handleCopy = () => {
+  console.log("Stack trace copied");
+};
+
+const sampleStackTrace = `TypeError: Cannot read properties of undefined (reading 'map')
+    at UserList (/app/components/UserList.tsx:15:23)
+    at renderWithHooks (node_modules/react-dom/cjs/react-dom.development.js:14985:18)
+    at mountIndeterminateComponent (node_modules/react-dom/cjs/react-dom.development.js:17811:13)
+    at beginWork (node_modules/react-dom/cjs/react-dom.development.js:19049:16)
+    at HTMLUnknownElement.callCallback (node_modules/react-dom/cjs/react-dom.development.js:3945:14)
+    at Object.invokeGuardedCallbackDev (node_modules/react-dom/cjs/react-dom.development.js:3994:16)
+    at invokeGuardedCallback (node_modules/react-dom/cjs/react-dom.development.js:4056:31)
+    at beginWork$1 (node_modules/react-dom/cjs/react-dom.development.js:23964:7)
+    at performUnitOfWork (node_modules/react-dom/cjs/react-dom.development.js:22776:12)
+    at workLoopSync (node_modules/react-dom/cjs/react-dom.development.js:22707:5)`;
+
+const Example = () => (
+  <StackTrace
+    defaultOpen
+    onFilePathClick={handleFilePathClick}
+    trace={sampleStackTrace}
+  >
+    <StackTraceHeader>
+      <StackTraceError>
+        <StackTraceErrorType />
+        <StackTraceErrorMessage />
+      </StackTraceError>
+      <StackTraceActions>
+        <StackTraceCopyButton onCopy={handleCopy} />
+        <StackTraceExpandButton />
+      </StackTraceActions>
+    </StackTraceHeader>
+    <StackTraceContent>
+      <StackTraceFrames />
+    </StackTraceContent>
+  </StackTrace>
+);
+
+export default Example;