feat: PostgreSQL → SQLite — thread-local, WAL, session-key, os.remove cleanup

site/app.py

@@ -29,36 +29,14 @@ def create_app():
 
 
 def _init_db():
-    """Schema migration + recovery: сброс застрявших classify."""
+    """Создать БД + схему + seed prompts. SQLite — всё в одном файле /tmp."""
+    from site.db.connection import init_db
+    init_db()
     try:
-        from site.db.connection import execute
-
-        for sql in [
-            "ALTER TABLE documents ADD COLUMN IF NOT EXISTS classify_raw text",
-            "ALTER TABLE documents ADD COLUMN IF NOT EXISTS classify_input text",
-            "ALTER TABLE documents ADD COLUMN IF NOT EXISTS zip_source text",
-            "ALTER TABLE documents ADD COLUMN IF NOT EXISTS content_hash text",
-            "ALTER TABLE documents ADD COLUMN IF NOT EXISTS batch_id uuid",
-            "ALTER TABLE documents ADD COLUMN IF NOT EXISTS classify_status text DEFAULT 'pending'",
-            "ALTER TABLE documents ALTER COLUMN classify_status SET DEFAULT 'pending'",
-            "ALTER TABLE documents ADD COLUMN IF NOT EXISTS doc_type text",
-            "ALTER TABLE documents ADD COLUMN IF NOT EXISTS own_number text",
-            "ALTER TABLE documents ADD COLUMN IF NOT EXISTS parent_number text",
-            "ALTER TABLE documents ADD COLUMN IF NOT EXISTS doc_date date",
-            "ALTER TABLE documents ADD COLUMN IF NOT EXISTS counterparty text",
-        ]:
-            execute(sql)
-
         from site.db import prompts as db_prompts
         db_prompts.seed_defaults()
-
-        # Crash recovery: сбросить застрявшие classify
-        execute(
-            "UPDATE documents SET classify_status='pending', error_message=NULL "
-            "WHERE classify_status='processing'"
-        )
     except Exception:
-        pass  # БД недоступна при старте — не фатально
+        pass
 
 
 app = create_app()