fix(lint): resolve ruff line-length and unused variable errors

- Shorten description strings in Task model fields (E501)
- Shorten comment for self-referential relationship (E501)
- Remove unused new_task variable assignment (F841)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: mjunaidca

packages/api/src/taskflow_api/models/task.py

@@ -67,7 +67,7 @@ class Task(SQLModel, table=True):
     )
     recurrence_pattern: str | None = Field(
         default=None,
-        description="Interval pattern: '1m', '5m', '10m', '15m', '30m', '1h', 'daily', 'weekly', 'monthly'",
+        description="Interval: 1m, 5m, 10m, 15m, 30m, 1h, daily, weekly, monthly",
     )
     max_occurrences: int | None = Field(
         default=None,
@@ -88,7 +88,7 @@ class Task(SQLModel, table=True):
     )
     has_spawned_next: bool = Field(
         default=False,
-        description="Whether this task has already spawned its next occurrence (prevents duplicates)",
+        description="Whether this task has already spawned its next occurrence",
     )
 
     # Foreign keys
@@ -125,7 +125,7 @@ class Task(SQLModel, table=True):
         sa_relationship_kwargs={"foreign_keys": "[Task.created_by_id]"},
     )
 
-    # Self-referential for subtasks (explicit foreign_keys needed due to recurring_root_id also being self-ref)
+    # Self-referential for subtasks (foreign_keys needed for recurring_root_id)
     parent: "Task" = Relationship(
         back_populates="subtasks",
         sa_relationship_kwargs={

packages/api/src/taskflow_api/routers/tasks.py

@@ -1135,11 +1135,8 @@ async def approve_task(
     )
 
     # Handle recurring task - create next occurrence
-    new_task = None
     if task.is_recurring and task.recurrence_pattern:
-        new_task = await create_next_occurrence(
-            session, task, worker_id, worker_type
-        )
+        await create_next_occurrence(session, task, worker_id, worker_type)
 
     await session.commit()
     await session.refresh(task)