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/product/extractors/breadcrumbs.py

@@ -3,7 +3,7 @@ from __future__ import annotations
 from typing import Dict, List, Union
 from urllib.parse import urlparse
 from bs4 import BeautifulSoup
-from utils import normalize_text
+from shared.utils import normalize_text
 from ..registry import extractor
 
 @extractor

scrape/product/extractors/description_sections.py

@@ -2,7 +2,7 @@
 from __future__ import annotations
 from typing import Dict, List
 from bs4 import BeautifulSoup
-from utils import normalize_text
+from shared.utils import normalize_text
 from ...html_utils import absolutize_fragment
 from ..registry import extractor
 from ..helpers.desc import (

scrape/product/extractors/info_table.py

@@ -2,7 +2,7 @@
 from __future__ import annotations
 from typing import Dict, Union
 from bs4 import BeautifulSoup
-from utils import normalize_text
+from shared.utils import normalize_text
 from ..registry import extractor
 from ..helpers.price import parse_price, parse_case_size
 

scrape/product/extractors/labels.py

@@ -2,7 +2,7 @@
 from __future__ import annotations
 from typing import Dict, List
 from bs4 import BeautifulSoup
-from utils import normalize_text
+from shared.utils import normalize_text
 from ..registry import extractor
 
 @extractor

scrape/product/extractors/nutrition_ex.py

@@ -2,7 +2,7 @@ from __future__ import annotations
 from typing import Dict, List, Optional, Tuple
 import re
 from bs4 import BeautifulSoup
-from utils import normalize_text
+from shared.utils import normalize_text
 from ..registry import extractor
 from ..helpers.desc import (
     split_description_container, find_description_container,

scrape/product/extractors/short_description.py

@@ -2,7 +2,7 @@
 from __future__ import annotations
 from typing import Dict
 from bs4 import BeautifulSoup
-from utils import normalize_text
+from shared.utils import normalize_text
 from ..registry import extractor
 
 @extractor

scrape/product/extractors/title.py

@@ -2,7 +2,7 @@
 from __future__ import annotations
 from typing import Dict
 from bs4 import BeautifulSoup
-from utils import normalize_text
+from shared.utils import normalize_text
 from ..registry import extractor
 
 @extractor