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-counter/pg_counter.py

@@ -0,0 +1,23 @@
+# 2026-03-21 — pg-counter: считает строки по prefix, возвращает статистику.
+# Тестирует: SELECT COUNT с WHERE LIKE, агрегация, concurrent reads.
+import os, psycopg2
+
+def count(event):
+    prefix = event.get("prefix", "")
+    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:
+        with conn.cursor() as cur:
+            if prefix:
+                cur.execute("SELECT COUNT(*) FROM terraform_demo_table WHERE title LIKE %s", (f"{prefix}%",))
+            else:
+                cur.execute("SELECT COUNT(*) FROM terraform_demo_table")
+            total = cur.fetchone()[0]
+            cur.execute("SELECT COUNT(*) FROM terraform_demo_table WHERE created_at > now() - interval '1 hour'")
+            last_hour = cur.fetchone()[0]
+        return {"total": total, "last_hour": last_hour, "prefix": prefix or "*"}
+    finally:
+        conn.close()

examples/POSTGRES/code/pg-counter/requirements.txt

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