Wire up direct-rates column; remove dormant pause-on-block flow

Direct-rates sub-row in Market View was dead: the frontend filters
competitors on direct_hotel_id but /matrix and /hotels never returned it.
Add direct_hotel_id to both queries (+ HotelResponse), and only render the
"Direct" sub-row when a hotel actually has a non-null direct rate (was
rendering all-dashes on an empty {} object).

Remove the pause-on-block flow entirely — dormant since rotate-on-block
replaced it (nothing set booking_scraper_paused=true after set_scraper_paused
was dropped): is_scraper_paused, /config/unpause, the /scrape paused guard,
ScraperStatusResponse.paused/pause_until, and the frontend Paused badge +
Unpause button. Trim now-unused datetime import.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

backend/services/booking_scraper.py

@@ -15,7 +15,7 @@ import asyncio
 import logging
 import threading
 import uuid
-from datetime import date, datetime, timedelta
+from datetime import date, timedelta
 from decimal import Decimal
 from typing import List, Optional, Dict, Any, Tuple
 
@@ -84,36 +84,6 @@ def get_scrape_config(db: Session) -> Optional[Dict[str, Any]]:
     }
 
 
-async def is_scraper_paused(db: Session) -> bool:
-    """Check if scraper is currently paused due to blocking."""
-    result = db.execute(
-        text("SELECT config_value FROM system_config WHERE config_key = 'booking_scraper_paused'")
-    ).fetchone()
-
-    if not result or result.config_value != 'true':
-        return False
-
-    # Check if pause period has expired
-    pause_until_result = db.execute(
-        text("SELECT config_value FROM system_config WHERE config_key = 'booking_scraper_pause_until'")
-    ).fetchone()
-
-    if pause_until_result and pause_until_result.config_value:
-        try:
-            pause_until = datetime.fromisoformat(pause_until_result.config_value)
-            if datetime.now() >= pause_until:
-                # Pause expired, reset
-                db.execute(
-                    text("UPDATE system_config SET config_value = 'false' WHERE config_key = 'booking_scraper_paused'")
-                )
-                db.commit()
-                return False
-        except ValueError:
-            pass
-
-    return True
-
-
 def save_hotel(db: Session, hotel: HotelData) -> int:
     """
     Save or update a hotel in the database.
@@ -557,13 +527,6 @@ async def _run_manual_scrape_locked(
     from_date: date,
     to_date: date
 ) -> Dict[str, Any]:
-    # Check if paused
-    if await is_scraper_paused(db):
-        return {
-            'success': False,
-            'error': 'Scraper is currently paused due to blocking. Try again later.',
-        }
-
     # Get config
     config = get_scrape_config(db)
     if not config:
@@ -745,13 +708,6 @@ async def process_queue(db: Session) -> Dict[str, Any]:
 
 
 async def _process_queue_locked(db: Session) -> Dict[str, Any]:
-    # Check if paused
-    if await is_scraper_paused(db):
-        return {
-            'success': False,
-            'error': 'Scraper is currently paused due to blocking.',
-        }
-
     # Get config
     config = get_scrape_config(db)
     if not config: