test: suite pytest per il gateway (21 test) + script di verifica pre-push

- conftest: FakeQdrant in-memory + mock embed (nessuna dipendenza da Qdrant/Ollama)
- test: validazione (project_id, kind, expires_at, confidence, lunghezza), auth (422/401/429), idempotency (replay/409/key diverse), supersede (404/409/lineage), filtri search, meta, status, metrics
- scripts/check.sh: esbuild (estensione) + pytest (gateway)
- requirements-dev.txt: pytest

scripts/check.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+# Verifica pre-push di pi-qmem: sintassi estensione (esbuild) + test gateway (pytest).
+# Uso: ./scripts/check.sh   (richiede: npx esbuild, python3 con pytest + deps gateway)
+set -euo pipefail
+cd "$(dirname "$0")/.."
+
+echo "── 1/2 Estensione: transpile esbuild ──"
+npx --no-install esbuild extensions/index.ts --outfile=/tmp/qmem-check.mjs
+echo "✅ estensione OK"
+
+echo "── 2/2 Gateway: pytest ──"
+cd gateway
+if ! python3 -c "import pytest, fastapi, qdrant_client, httpx, pydantic" 2>/dev/null; then
+  echo "⚠️ dipendenze mancanti: pip install -r requirements.txt -r requirements-dev.txt"
+  exit 1
+fi
+python3 -m pytest tests/ -q
+echo "✅ gateway OK"