feat(service): timeout_sec без дефолта; 0=нет таймаута; operator v0.1.48

- api/v1alpha1/service_types.go: убрать +kubebuilder:default=30
- invoke.go: TimeoutSec=0 → &http.Client{} (без таймаута)
- services.go: валидация timeout_sec < 0 || > 900 → HTTP 400
- service_resource.go: TF schema Optional (без Computed); 0 → Int64Null()
- deployments/k8s/operator.yaml: v0.1.47 → v0.1.48
- doc/: progress.md + api/design.md (модель Service) + decisions/log.md
- examples/POSTGRES/: bug_hunter.sh, chaos_marathon.sh, chaos_marathon.tf

examples/POSTGRES/code/pg-bulk-insert/pg_bulk_insert.py

@@ -0,0 +1,38 @@
+# 2026-03-21 — pg-bulk-insert: bulk INSERT через execute_values.
+# Тестирует: большие батчи (до 500 строк), производительность, память.
+import os, time, psycopg2, psycopg2.extras
+
+def bulk_insert(event):
+    try:
+        n = max(0, min(int(event.get("n", 50)), 500))  # cap 500, min 0
+    except (TypeError, ValueError):
+        n = 50
+    prefix = str(event.get("prefix", "bulk"))[:50]
+    ts = int(time.time() * 1000)
+
+    # n=0 — граничный случай: вернуть сразу без обращения к PG.
+    if n == 0:
+        return {"inserted": 0, "first_id": None, "elapsed_sec": 0.0}
+
+    rows = [(f"{prefix}-{ts}-{i}",) for i in range(n)]
+
+    conn = psycopg2.connect(
+        host=os.environ["PGHOST"], port=int(os.environ.get("PGPORT", 5432)),
+        dbname=os.environ["PGDATABASE"], user=os.environ["PGUSER"],
+        password=os.environ["PGPASSWORD"], sslmode=os.environ.get("PGSSLMODE", "require"),
+    )
+    try:
+        t0 = time.time()
+        with conn.cursor() as cur:
+            psycopg2.extras.execute_values(
+                cur,
+                "INSERT INTO terraform_demo_table (title) VALUES %s RETURNING id",
+                rows,
+                page_size=100,
+            )
+            ids = [r[0] for r in cur.fetchall()]
+        conn.commit()
+        elapsed = round(time.time() - t0, 3)
+        return {"inserted": len(ids), "first_id": ids[0] if ids else None, "elapsed_sec": elapsed}
+    finally:
+        conn.close()

examples/POSTGRES/code/pg-bulk-insert/requirements.txt

@@ -0,0 +1 @@
+psycopg2-binary