Implement task 006 site config versioning and audit events

apps/backend/src/infrastructure/schema.py

@@ -285,6 +285,17 @@ POSTGRES_SCHEMA_STATEMENTS: tuple[str, ...] = (
         UNIQUE (prompt_key, version)
     )
     """,
+    f"""
+    CREATE TABLE IF NOT EXISTS script_config_version_events (
+        id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+        target_site_id UUID NOT NULL REFERENCES target_sites(id) ON DELETE CASCADE,
+        version_id UUID NOT NULL REFERENCES script_config_versions(id) ON DELETE CASCADE,
+        event_type TEXT NOT NULL,
+        actor_user_id UUID REFERENCES users(id),
+        payload JSONB NOT NULL DEFAULT '{{}}'::jsonb,
+        created_at TIMESTAMPTZ NOT NULL DEFAULT now()
+    )
+    """,
     "CREATE INDEX IF NOT EXISTS idx_target_sites_slug ON target_sites (slug)",
     """
     CREATE INDEX IF NOT EXISTS idx_articles_dashboard
@@ -314,6 +325,10 @@ POSTGRES_SCHEMA_STATEMENTS: tuple[str, ...] = (
     CREATE INDEX IF NOT EXISTS idx_publish_commits_article
     ON publish_commits (article_id, created_at)
     """,
+    """
+    CREATE INDEX IF NOT EXISTS idx_script_config_version_events_site
+    ON script_config_version_events (target_site_id, created_at)
+    """,
 )
 
 
@@ -550,6 +565,17 @@ SQLITE_SCHEMA_STATEMENTS: tuple[str, ...] = (
         UNIQUE (prompt_key, version)
     )
     """,
+    """
+    CREATE TABLE IF NOT EXISTS script_config_version_events (
+        id TEXT PRIMARY KEY,
+        target_site_id TEXT NOT NULL,
+        version_id TEXT NOT NULL,
+        event_type TEXT NOT NULL,
+        actor_user_id TEXT,
+        payload TEXT NOT NULL DEFAULT '{}',
+        created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP
+    )
+    """,
     "CREATE INDEX IF NOT EXISTS idx_target_sites_slug ON target_sites (slug)",
     """
     CREATE INDEX IF NOT EXISTS idx_articles_dashboard
@@ -579,6 +605,10 @@ SQLITE_SCHEMA_STATEMENTS: tuple[str, ...] = (
     CREATE INDEX IF NOT EXISTS idx_publish_commits_article
     ON publish_commits (article_id, created_at)
     """,
+    """
+    CREATE INDEX IF NOT EXISTS idx_script_config_version_events_site
+    ON script_config_version_events (target_site_id, created_at)
+    """,
 )