feat(integrations): add Zapier app for Mem0

A Zapier Platform CLI app (TypeScript) wrapping the hosted Mem0 v3 REST API:
Add / Search / Get Memories / Delete actions with custom API-key auth.

- Written in TypeScript, compiles to dist/; offline unit tests (mocked z.request)
  plus live E2E; `zapier validate` clean
- Add supports custom_instructions, custom_categories, includes, excludes;
  Wait-for-Completion defaults off (extraction can exceed Zapier's 30s step limit)
- Middleware surfaces non-2xx as errors (no silent empty results)
- Anonymous opt-out telemetry (MEM0_TELEMETRY=false)
- Docs page + docs.json/llms.txt entry, ci-gate wiring, AGENTS.md rows

Split out of #6057 per review (separate PRs per integration).

integrations/zapier-mem0/src/searches/search_memories.ts

@@ -0,0 +1,40 @@
+import type { ZObject, Bundle, Memory } from '../types';
+import { captureEvent } from '../telemetry';
+
+const perform = async (z: ZObject, bundle: Bundle): Promise<Memory[]> => {
+	const body: Record<string, unknown> = {
+		query: bundle.inputData.query,
+		output_format: 'v1.1',
+		top_k: Math.max(1, Math.floor(Number(bundle.inputData.limit) || 50)),
+	};
+	if (bundle.inputData.user_id) body.filters = { user_id: bundle.inputData.user_id };
+
+	captureEvent('zapier.search_memories', bundle.authData?.apiKey);
+
+	const response = await z.request({
+		url: '/v3/memories/search/',
+		method: 'POST',
+		body,
+	});
+	// Searches must return an array.
+	const data = response.data as Memory[] | { results?: Memory[] };
+	return Array.isArray(data) ? data : data.results || [];
+};
+
+export default {
+	key: 'search_memories',
+	noun: 'Memory',
+	display: {
+		label: 'Search Memories',
+		description: 'Semantic search over stored memories.',
+	},
+	operation: {
+		perform,
+		inputFields: [
+			{ key: 'query', label: 'Query', type: 'string', required: true },
+			{ key: 'user_id', label: 'User ID', type: 'string', required: true },
+			{ key: 'limit', label: 'Limit', type: 'integer', default: '50' },
+		],
+		sample: { id: '00000000-0000-0000-0000-000000000000', memory: 'User loves hiking' },
+	},
+};