fix(zapier): address review feedback (masked key, ES imports) + test hygiene

- authentication: API key field is now type 'password' so Zapier masks it in
  the connection UI instead of showing it in cleartext.
- index: use ES imports for the platform version and package version instead of
  require(), matching the repo's TypeScript rule. dist stays flat; both versions
  resolve at runtime.
- AGENTS.md: add the Key Directories row for integrations/zapier-mem0.
- tests: disable telemetry during test runs so CI never fires real PostHog
  events, which also removes a lingering open handle after the suite.

Verified: build + zapier validate (0 failures) + 16 tests (13 unit, 3 live E2E).

AGENTS.md

@@ -27,6 +27,7 @@ This is a **polyglot monorepo** containing Python and TypeScript packages, CLIs,
 | `integrations/openclaw/` | `@mem0/openclaw-mem0` — OpenClaw plugin for Claude Code / AI editors |
 | `integrations/pi-agent-plugin/` | `@mem0/pi-agent-plugin` — Pi Agent plugin |
 | `integrations/vercel-ai-sdk/` | `@mem0/vercel-ai-provider` — Vercel AI SDK memory provider |
+| `integrations/zapier-mem0/` | `zapier-mem0` — Zapier Platform CLI app (deploys to Zapier, not npm); add / search / get / delete memories |
 | `server/` | FastAPI REST server for self-hosted Mem0 (Docker: FastAPI + PostgreSQL/pgvector + Neo4j) |
 | `openmemory/` | Self-hosted memory platform — `api/` (FastAPI + Alembic + MCP server) and `ui/` (Next.js 15 + React 19) |
 | `skills/` | Claude Code skill definitions. Reference skills (SDK knowledge, always-on): `mem0/`, `mem0-cli/`, `mem0-vercel-ai-sdk/`. Pipeline skills (run on demand): `mem0-integrate/`, `mem0-test-integration/`, `mem0-oss-to-platform/` |