feat: decouple market from shared_lib, add app-owned models

Phase 1-3 of decoupling:
- path_setup.py adds project root to sys.path
- Market-owned models in market/models/ (market, market_place)
- All imports updated: shared.infrastructure, shared.db, shared.browser, etc.
- MarketPlace uses container_type/container_id instead of post_id FK

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

scrape/persist_snapshot/capture_listing.py

@@ -17,7 +17,7 @@ from models.market import (
     Listing,
     ListingItem,
 )
-from db.session import get_session
+from shared.db.session import get_session
 
 # --- Models are unchanged, see original code ---
 

scrape/persist_snapshot/log_product_result.py

@@ -5,7 +5,7 @@ from typing import Dict
 from models.market import (
     ProductLog,
 )
-from db.session import get_session
+from shared.db.session import get_session
 
 
 async def log_product_result(ok: bool, payload: Dict) -> None:

scrape/persist_snapshot/save_link_reports.py

@@ -7,7 +7,7 @@ from models.market import (
     LinkError,
     LinkExternal,
 )
-from db.session import get_session
+from shared.db.session import get_session
 
 # --- Models are unchanged, see original code ---
 

scrape/persist_snapshot/save_nav.py

@@ -9,7 +9,7 @@ from models.market import (
     NavTop,
     NavSub,
 )
-from db.session import get_session
+from shared.db.session import get_session
 
 
 

scrape/persist_snapshot/save_subcategory_redirects.py

@@ -8,7 +8,7 @@ from sqlalchemy import (
 from models.market import (
     SubcategoryRedirect,
 )
-from db.session import get_session
+from shared.db.session import get_session
 
 # --- Models are unchanged, see original code ---
 

scrape/persist_snapshot/upsert_product.py

@@ -17,7 +17,7 @@ from models.market import (
     ProductNutrition,
     ProductAllergen
 )
-from db.session import get_session
+from shared.db.session import get_session
 
 from ._get import _get
 from .log_product_result import _log_product_result