feat(frontend): add Run now button and matching runs list on event details page

- New adminAPI for run-now and runs listing
- MatchingRunsSection with refresh and run controls
- Integrate into EventDetailsPage under matching configuration

backend/prisma/migrations/20251130120000_add_matching_runs_audit/migration.sql

@@ -0,0 +1,21 @@
+-- CreateTable
+CREATE TABLE "matching_runs" (
+    "id" SERIAL NOT NULL,
+    "event_id" INTEGER NOT NULL,
+    "trigger" VARCHAR(20) NOT NULL,
+    "status" VARCHAR(20) NOT NULL DEFAULT 'running',
+    "started_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "ended_at" TIMESTAMP(3),
+    "matched_count" INTEGER NOT NULL DEFAULT 0,
+    "not_found_count" INTEGER NOT NULL DEFAULT 0,
+    "error" TEXT,
+
+    CONSTRAINT "matching_runs_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE INDEX "matching_runs_event_id_started_at_idx" ON "matching_runs"("event_id", "started_at");
+
+-- AddForeignKey
+ALTER TABLE "matching_runs" ADD CONSTRAINT "matching_runs_event_id_fkey" FOREIGN KEY ("event_id") REFERENCES "events"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+