Phase 0.1: Remove backend deprecated code

- Delete routes: counter.py, sum.py
- Delete jobs.py and worker.py
- Delete tests: test_counter.py, test_jobs.py
- Update audit.py: keep only price-history endpoints
- Update models.py: remove VIEW_COUNTER, INCREMENT_COUNTER, USE_SUM permissions
- Update models.py: remove Counter, SumRecord, CounterRecord, RandomNumberOutcome models
- Update schemas.py: remove sum/counter related schemas
- Update main.py: remove deleted router imports
- Update test_permissions.py: remove tests for deprecated features
- Update test_price_history.py: remove worker-related tests
- Update conftest.py: remove mock_enqueue_job fixture
- Update auth.py: fix example in docstring

backend/schemas.py

@@ -37,42 +37,6 @@ class RegisterWithInvite(BaseModel):
     invite_identifier: str
 
 
-class SumRequest(BaseModel):
-    """Request model for sum calculation."""
-
-    a: float
-    b: float
-
-
-class SumResponse(BaseModel):
-    """Response model for sum calculation."""
-
-    a: float
-    b: float
-    result: float
-
-
-class CounterRecordResponse(BaseModel):
-    """Response model for a counter audit record."""
-
-    id: int
-    user_email: str
-    value_before: int
-    value_after: int
-    created_at: datetime
-
-
-class SumRecordResponse(BaseModel):
-    """Response model for a sum audit record."""
-
-    id: int
-    user_email: str
-    a: float
-    b: float
-    result: float
-    created_at: datetime
-
-
 RecordT = TypeVar("RecordT", bound=BaseModel)
 
 
@@ -86,10 +50,6 @@ class PaginatedResponse(BaseModel, Generic[RecordT]):
     total_pages: int
 
 
-PaginatedCounterRecords = PaginatedResponse[CounterRecordResponse]
-PaginatedSumRecords = PaginatedResponse[SumRecordResponse]
-
-
 class ProfileResponse(BaseModel):
     """Response model for profile data."""
 
@@ -258,24 +218,6 @@ class AppointmentResponse(BaseModel):
 PaginatedAppointments = PaginatedResponse[AppointmentResponse]
 
 
-# =============================================================================
-# Random Number Job Schemas
-# =============================================================================
-
-
-class RandomNumberOutcomeResponse(BaseModel):
-    """Response model for a random number job outcome."""
-
-    id: int
-    job_id: int
-    triggered_by_user_id: int
-    triggered_by_email: str
-    value: int
-    duration_ms: int
-    status: str
-    created_at: datetime
-
-
 # =============================================================================
 # Price History Schemas
 # =============================================================================