Monorepo: consolidate 7 repos into one

Combines shared, blog, market, cart, events, federation, and account
into a single repository. Eliminates submodule sync, sibling model
copying at build time, and per-app CI orchestration.

Changes:
- Remove per-app .git, .gitmodules, .gitea, submodule shared/ dirs
- Remove stale sibling model copies from each app
- Update all 6 Dockerfiles for monorepo build context (root = .)
- Add build directives to docker-compose.yml
- Add single .gitea/workflows/ci.yml with change detection
- Add .dockerignore for monorepo build context
- Create __init__.py for federation and account (cross-app imports)

market/scrape/product/helpers/text.py

@@ -0,0 +1,16 @@
+
+from __future__ import annotations
+import re
+from shared.utils import normalize_text
+from shared.config import config
+
+def clean_title(t: str) -> str:
+    t = normalize_text(t)
+    t = re.sub(r":\s*$", "", t)
+    return t
+
+def is_blacklisted_heading(title: str) -> bool:
+    """Return True if heading should be skipped based on config blacklist."""
+    bl = (config().get("blacklist") or {}).get("product-details") or []
+    low = (title or "").strip().lower()
+    return any(low == (s or "").strip().lower() for s in bl)