feat: full pipeline fixes - CI status branch lookup, review webhook routing, auto-advance, plane sync

- handle_ci_status: fallback git branch -r --contains when branches[] empty
- webhook router: handle pull_request_approved event type
- handle_pr: map review.type to review.state for new Gitea format
- launcher: auto-advance stage after agent completion (_try_advance_stage)
- plane_sync: notify Plane on stage changes
- stages.py: stage machine with QG definitions
- notifications.py: stage change notifications
- safe.directory fix for container git operations

src/db.py

@@ -22,6 +22,7 @@ def init_db():
         CREATE TABLE IF NOT EXISTS tasks (
             id INTEGER PRIMARY KEY AUTOINCREMENT,
             plane_id TEXT,
+            work_item_id TEXT,
             repo TEXT NOT NULL,
             branch TEXT,
             stage TEXT DEFAULT 'created',
@@ -40,3 +41,58 @@ def init_db():
         );
     """)
     conn.close()
+
+
+def get_task_by_plane_id(plane_id: str) -> dict | None:
+    """Find task by Plane work item ID (checks plane_id and plane_issue_id)."""
+    conn = get_db()
+    row = conn.execute(
+        "SELECT * FROM tasks WHERE plane_id = ? OR plane_issue_id = ?", (plane_id, plane_id)
+    ).fetchone()
+    conn.close()
+    if row:
+        return dict(row)
+    return None
+
+
+def get_task_by_repo_branch(repo: str, branch: str) -> dict | None:
+    """Find task by repo and branch name."""
+    conn = get_db()
+    row = conn.execute(
+        "SELECT * FROM tasks WHERE repo = ? AND branch = ?", (repo, branch)
+    ).fetchone()
+    conn.close()
+    if row:
+        return dict(row)
+    return None
+
+
+def update_task_stage(task_id: int, stage: str):
+    """Update task stage and timestamp."""
+    conn = get_db()
+    conn.execute(
+        "UPDATE tasks SET stage = ?, updated_at = datetime('now') WHERE id = ?",
+        (stage, task_id),
+    )
+    conn.commit()
+    conn.close()
+
+
+def get_next_work_item_id(repo: str) -> str:
+    """Generate next work item ID (e.g., ET-003)."""
+    conn = get_db()
+    row = conn.execute(
+        "SELECT work_item_id FROM tasks WHERE repo = ? AND work_item_id IS NOT NULL ORDER BY id DESC LIMIT 1",
+        (repo,),
+    ).fetchone()
+    conn.close()
+
+    if row and row["work_item_id"]:
+        # Parse ET-003 -> 3, increment
+        prefix, num = row["work_item_id"].rsplit("-", 1)
+        next_num = int(num) + 1
+    else:
+        prefix = "ET"
+        next_num = 1
+
+    return f"{prefix}-{next_num:03d}"