fix: Add missing columns to daily_workflow_plans table

- Added generation_mode column (VARCHAR, default: 'llm_generation')
- Added committee_agent_count column (INTEGER, default: 0)
- Added fallback_used column (BOOLEAN, default: 0)

Also fixed:
- Imported daily_workflow_models in services/database.py to ensure models are registered
- Added _create_daily_workflow_tables() to database setup
- Created migration script to add columns to 35 existing databases
- Fixed WorkflowError type in frontend to use constructor for proper 'name' property

This resolves the 'no such column' sqlite3 errors when accessing the today-workflow API.

backend/check_tables.py

@@ -0,0 +1,32 @@
+#!/usr/bin/env python
+import sqlite3
+import os
+
+db_path = 'alwrity.db'
+if os.path.exists(db_path):
+    conn = sqlite3.connect(db_path)
+    cursor = conn.cursor()
+    
+    # Check daily workflow tables
+    cursor.execute("SELECT name FROM sqlite_master WHERE type='table' AND name LIKE 'daily_%'")
+    daily_tables = [row[0] for row in cursor.fetchall()]
+    print(f"Daily workflow tables: {daily_tables}")
+    
+    # Check the columns in daily_workflow_plans if it exists
+    if 'daily_workflow_plans' in daily_tables:
+        cursor.execute("PRAGMA table_info(daily_workflow_plans)")
+        columns = cursor.fetchall()
+        col_names = [col[1] for col in columns]
+        print(f"Columns in daily_workflow_plans: {col_names}")
+        
+        # Check if generation_mode exists
+        if 'generation_mode' in col_names:
+            print("✅ generation_mode column exists")
+        else:
+            print("❌ generation_mode column missing")
+    else:
+        print("❌ daily_workflow_plans table doesn't exist")
+    
+    conn.close()
+else:
+    print(f"❌ Database file {db_path} not found")