docs: simplify Swagger documentation across all routers

- Simplify attendance router (check-in, check-out, summary)
- Simplify tasks router (get tasks, update status)
- Simplify expenses router (submit expense)
- Remove verbose sections and keep only essential information
- Improve documentation readability and conciseness

app/tracker/attendance/router.py

@@ -37,20 +37,10 @@ router = APIRouter(prefix="/attendance", tags=["Attendance"])
     description="""
     Mark the start of an employee's working day.
     
-    **Rules:**
     - Can check-in only once per day
     - Location coordinates are mandatory
-    - GPS tracking must be enabled for the employee
     - Optional location_id if inside a geofence
-    - Timestamp and work_date are automatically set by the server
-    
-    **Edge Cases:**
-    - Duplicate check-in → 400 error
-    - GPS disabled → 400 error (checked from MongoDB: scm_employees.location_settings.location_tracking_consent)
-    
-    **Data Storage:**
-    - Stores server timestamp, coordinates, and geofence match (if any) in PostgreSQL
-    - Table: trans.scm_attendance
+    - GPS tracking must be enabled for the employee
     """
 )
 async def check_in(
@@ -153,21 +143,10 @@ async def check_in(
     Mark the end of an employee's working day and calculate total working time.
     
     **Rules:**
-    - Allowed only after successful check-in
+    - Must have checked in earlier on the same day
     - Location coordinates are mandatory
     - Auto-calculates total working hours in minutes
     - GPS tracking must be enabled for the employee
-    - Timestamp and work_date are automatically set by the server
-    
-    **Edge Cases:**
-    - No check-in found → 400 error
-    - Already checked out → 400 error
-    - GPS disabled → 400 error
-    - Check-out time before check-in time → 400 error (prevented by server time)
-    
-    **Data Storage:**
-    - Updates the attendance record with check-out timestamp, coordinates, and total working minutes
-    - Table: trans.scm_attendance
     """
 )
 async def check_out(
@@ -278,12 +257,8 @@ async def check_out(
     - date: Date in YYYY-MM-DD format (defaults to today if not provided)
 
     **Authentication:**
-    - Requires valid JWT token
     - Returns attendance for the authenticated employee only
-
-    **Behavior:**
-    - Returns empty attendance (not checked in) if no record found for the date
-    - Does not return 404 error for missing records
+    - Returns empty attendance if no record found for the date
     """
 )
 async def get_daily_attendance(

app/tracker/expenses/router.py

@@ -43,41 +43,11 @@ router = APIRouter(prefix="/expenses", tags=["Expenses"])
     description="""
     Submit a new expense for reimbursement.
     
-    **Expense Types:**
-    - Fuel: Gas, diesel, vehicle fuel
-    - Food: Meals, snacks during work
-    - Lodging: Hotel, accommodation
-    - Miscellaneous: Other work-related expenses
-    
-    **Business Rules:**
-    - ✅ Receipt photo is mandatory for all reimbursable expenses
-    - ✅ Default status is 'pending' (requires admin approval)
-    - ✅ Amount must be positive
-    - ✅ Currency must be valid ISO 4217 code (3 letters)
-    - ✅ Timestamp must be within 30 days
-    
-    **Security:**
-    - JWT authentication required
-    - Merchant ID validated from token
-    - User ID validated from token
-    - All expenses are merchant-scoped
-    
-    **Validation:**
-    - Amount: Must be positive, max 1,000,000
-    - Currency: 3-letter ISO code (USD, THB, etc.)
-    - Timestamp: Within 30 days past, max 5 min future
-    - Receipt: Mandatory, must be valid URL
-    - Note: Optional, max 500 characters
-    
-    **Response:**
-    - Returns unique expense ID (UUID)
-    - Status is always 'pending' on creation
-    - Admin approval required for reimbursement
-    
-    **Error Handling:**
-    - 400 Bad Request: If validation fails
-    - 401 Unauthorized: If JWT invalid
-    - 500 Internal Error: If database operation fails
+    - Types: Fuel, Food, Lodging, Miscellaneous
+    - Receipt photo is mandatory
+    - Amount must be positive, currency in ISO 4217 format
+    - Timestamp must be within 30 days
+    - Default status: pending (requires admin approval)
     """
 )
 async def submit_expense(

app/tracker/tasks/router.py

@@ -32,22 +32,9 @@ router = APIRouter(prefix="/tasks", tags=["Tasks"])
     description="""
     Fetch all tasks assigned to the authenticated employee for today.
     
-    **Returns:**
-    - List of tasks with title, description, status, location, and scheduled time
-    - Tasks are ordered by scheduled time (earliest first)
-    
-    **Task Status:**
-    - not_started: Task has not been started yet
-    - in_progress: Task is currently being worked on
-    - completed: Task has been completed
-    
-    **Authentication:**
-    - Requires valid JWT token
-    - Returns tasks for the authenticated employee only
-    
-    **Data Source:**
-    - Table: scm_tasks
-    - Filters by: assigned_to (employee_id) and scheduled_at (today's date)
+    - Returns tasks ordered by scheduled time
+    - Includes task status, location, and scheduled time
+    - Status: not_started, in_progress, completed
     """
 )
 async def get_today_tasks(
@@ -126,33 +113,10 @@ async def get_today_tasks(
     description="""
     Update the status of a task with location and timestamp tracking.
     
-    **Supported Status Values:**
-    - not_started: Task has not been started yet
-    - in_progress: Task is currently being worked on
-    - completed: Task has been completed
-    
-    **Rules:**
-    - Location (latitude/longitude) is mandatory for every update
-    - Timestamp is mandatory and must be in Unix milliseconds
-    - Status transitions are validated (e.g., can't go from completed to not_started directly)
-    - Only the assigned employee can update the task
-    - Merchant ID must match the task's merchant
-    
-    **Status Transitions:**
-    - not_started → in_progress (captures started_at timestamp)
-    - not_started → completed (direct completion allowed)
-    - in_progress → completed (captures completed_at timestamp)
-    - in_progress → not_started (revert allowed)
-    - completed → in_progress (reopening allowed)
-    
-    **Timestamps Captured:**
-    - started_at: Set when status changes to in_progress
-    - completed_at: Set when status changes to completed
-    - updated_at: Set on every update
-    
-    **Authentication:**
-    - Requires valid JWT token
-    - Task must be assigned to the authenticated employee
+    - Status: not_started, in_progress, completed
+    - Location and timestamp are mandatory
+    - Only assigned employee can update
+    - Captures started_at and completed_at timestamps
     """
 )
 async def update_task_status(