chore: bootstrap repository with governance docs

Initialize git, add Apache-2.0 LICENSE, .gitattributes (LF line
endings), AGENTS.md (entry points, stack, discovery order, baseline
checks), RUNBOOK.md (dev boot, prod deploy with overlay, ingestion,
failures, rollback, scaling notes), .env.prod.example with rotated
credential placeholders, and dev-only warnings on .env.example.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

frontend/src/hooks/useIngestion.ts

@@ -0,0 +1,23 @@
+import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
+import { ingestFolder, listRuns } from "@/services/ingestion";
+import type { IngestFolderRequest } from "@/services/types";
+
+export function useIngestionRuns() {
+  return useQuery({
+    queryKey: ["ingestion-runs"],
+    queryFn: listRuns,
+    refetchInterval: 15_000,
+  });
+}
+
+export function useStartIngestion() {
+  const qc = useQueryClient();
+  return useMutation({
+    mutationFn: (req: IngestFolderRequest) => ingestFolder(req),
+    onSuccess: () => {
+      qc.invalidateQueries({ queryKey: ["ingestion-runs"] });
+      qc.invalidateQueries({ queryKey: ["documents"] });
+      qc.invalidateQueries({ queryKey: ["dashboard"] });
+    },
+  });
+}