Add Eviivo, QBook and Mews direct scrape profiles

Three new engine profiles for competitor direct-rate monitoring:
- eviivo: HTML scrape via httpx (no JSON API); presence = available, no room count
- qbook: QBook/Hotels UK JSON API; availableroom count, skip roomprice=0 (unconfigured rate)
- mews: Mews Booking Engine v1 API (unauthenticated); getAvailability + getPricing; proper net/gross split; timezone-aware per property

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/services/direct_profiles/__init__.py

@@ -2,6 +2,9 @@ from .guestline import GuestlineProfile
 from .newbook_scrape import NewbookScrapeProfile
 from .travelclick import TravelClickProfile
 from .directbook import DirectBookProfile
+from .eviivo import EviivoProfile
+from .qbook import QBookProfile
+from .mews import MewsProfile
 from .base import BaseProfile
 
 PROFILES = {
@@ -9,6 +12,9 @@ PROFILES = {
     "newbook_scrape": NewbookScrapeProfile,
     "travelclick": TravelClickProfile,
     "directbook": DirectBookProfile,
+    "eviivo": EviivoProfile,
+    "qbook": QBookProfile,
+    "mews": MewsProfile,
 }