fix: 从 ErrorLog 迁移已有项目到 Project 表

新 Project 表为空导致项目列表不显示，增加迁移 SQL
从 ErrorLog 中 DISTINCT project_id 补入 Project 表。

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/database.py

@@ -34,6 +34,11 @@ async def init_db():
             "CREATE INDEX IF NOT EXISTS ix_errorlog_source ON errorlog (source)",
             # ErrorLog failure_reason
             "ALTER TABLE errorlog ADD COLUMN IF NOT EXISTS failure_reason TEXT",
+            # Seed Project table from existing ErrorLog data
+            """INSERT INTO project (project_id, created_at, updated_at)
+               SELECT DISTINCT e.project_id, NOW(), NOW()
+               FROM errorlog e
+               WHERE NOT EXISTS (SELECT 1 FROM project p WHERE p.project_id = e.project_id)""",
         ]
         for sql in migrations:
             try: