Implement task 014 assets and media library workflow

apps/backend/src/infrastructure/schema.py

@@ -237,9 +237,11 @@ POSTGRES_SCHEMA_STATEMENTS: tuple[str, ...] = (
     CREATE TABLE IF NOT EXISTS assets (
         id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
         article_id UUID NOT NULL REFERENCES articles(id) ON DELETE CASCADE,
+        section_id UUID REFERENCES plan_sections(id) ON DELETE SET NULL,
         asset_type TEXT NOT NULL CHECK (asset_type IN ({ASSET_TYPE_VALUES})),
         title TEXT NOT NULL,
         prompt TEXT,
+        object_key TEXT,
         file_url TEXT,
         alt_text TEXT,
         caption TEXT,
@@ -248,6 +250,20 @@ POSTGRES_SCHEMA_STATEMENTS: tuple[str, ...] = (
         updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
     )
     """,
+    "ALTER TABLE assets ADD COLUMN IF NOT EXISTS section_id UUID REFERENCES plan_sections(id) ON DELETE SET NULL",
+    "ALTER TABLE assets ADD COLUMN IF NOT EXISTS object_key TEXT",
+    f"""
+    CREATE TABLE IF NOT EXISTS asset_revisions (
+        id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+        article_id UUID NOT NULL REFERENCES articles(id) ON DELETE CASCADE,
+        asset_id UUID NOT NULL REFERENCES assets(id) ON DELETE CASCADE,
+        revision_index INTEGER NOT NULL,
+        action TEXT NOT NULL,
+        actor_user_id UUID REFERENCES users(id),
+        payload JSONB NOT NULL DEFAULT '{{}}'::jsonb,
+        created_at TIMESTAMPTZ NOT NULL DEFAULT now()
+    )
+    """,
     f"""
     CREATE TABLE IF NOT EXISTS workflow_events (
         id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
@@ -370,6 +386,10 @@ POSTGRES_SCHEMA_STATEMENTS: tuple[str, ...] = (
     ON workflow_events (article_id, created_at)
     """,
     """
+    CREATE INDEX IF NOT EXISTS idx_asset_revisions_asset
+    ON asset_revisions (asset_id, revision_index, created_at)
+    """,
+    """
     CREATE INDEX IF NOT EXISTS idx_research_run_manifests_article
     ON research_run_manifests (article_id, created_at)
     """,
@@ -553,9 +573,11 @@ SQLITE_SCHEMA_STATEMENTS: tuple[str, ...] = (
     CREATE TABLE IF NOT EXISTS assets (
         id TEXT PRIMARY KEY,
         article_id TEXT NOT NULL,
+        section_id TEXT,
         asset_type TEXT NOT NULL,
         title TEXT NOT NULL,
         prompt TEXT,
+        object_key TEXT,
         file_url TEXT,
         alt_text TEXT,
         caption TEXT,
@@ -565,6 +587,18 @@ SQLITE_SCHEMA_STATEMENTS: tuple[str, ...] = (
     )
     """,
     """
+    CREATE TABLE IF NOT EXISTS asset_revisions (
+        id TEXT PRIMARY KEY,
+        article_id TEXT NOT NULL,
+        asset_id TEXT NOT NULL,
+        revision_index INTEGER NOT NULL,
+        action TEXT NOT NULL,
+        actor_user_id TEXT,
+        payload TEXT NOT NULL DEFAULT '{}',
+        created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP
+    )
+    """,
+    """
     CREATE TABLE IF NOT EXISTS workflow_events (
         id TEXT PRIMARY KEY,
         article_id TEXT NOT NULL,
@@ -676,6 +710,10 @@ SQLITE_SCHEMA_STATEMENTS: tuple[str, ...] = (
     ON workflow_events (article_id, created_at)
     """,
     """
+    CREATE INDEX IF NOT EXISTS idx_asset_revisions_asset
+    ON asset_revisions (asset_id, revision_index, created_at)
+    """,
+    """
     CREATE INDEX IF NOT EXISTS idx_research_run_manifests_article
     ON research_run_manifests (article_id, created_at)
     """,