fix(cms): open analytics DB in worker + fix per-language article upsert

Three bugs causing 0 articles after generation:

1. Worker never called open_analytics_db() — fetch_analytics always
   returned [] since _conn was None. Generation completed silently with
   0 rows from DuckDB.

2. generate_articles upserted by url_path alone — after the URL prefix
   fix, all languages share the same url_path (e.g. /markets/de/berlin).
   The EN article was overwriting the DE article on every generation.
   Fixed: deduplicate on (url_path, language).

3. article_page and _filter_articles didn't filter by language — with
   shared url_paths a DE request could serve an EN article, and the
   markets hub would show duplicate entries per city. Fixed: both now
   filter by g.lang from the /<lang> blueprint prefix.

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

web/src/padelnomics/content/__init__.py

@@ -434,9 +434,11 @@ async def generate_articles(
             md_dir.mkdir(parents=True, exist_ok=True)
             (md_dir / f"{article_slug}.md").write_text(body_md)
 
-            # Upsert article in SQLite
+            # Upsert article in SQLite — keyed by (url_path, language) since
+            # multiple languages share the same url_path
             existing_article = await fetch_one(
-                "SELECT id FROM articles WHERE url_path = ?", (url_path,),
+                "SELECT id FROM articles WHERE url_path = ? AND language = ?",
+                (url_path, lang),
             )
             if existing_article:
                 await execute(
@@ -444,8 +446,8 @@ async def generate_articles(
                        SET title = ?, meta_description = ?, template_slug = ?,
                            language = ?, date_modified = ?, updated_at = ?,
                            seo_head = ?
-                       WHERE url_path = ?""",
-                    (title, meta_desc, slug, lang, now_iso, now_iso, seo_head, url_path),
+                       WHERE url_path = ? AND language = ?""",
+                    (title, meta_desc, slug, lang, now_iso, now_iso, seo_head, url_path, lang),
                 )
             else:
                 await execute(

web/src/padelnomics/content/routes.py

@@ -7,7 +7,7 @@ from pathlib import Path
 
 from jinja2 import Environment, FileSystemLoader
 from markupsafe import Markup
-from quart import Blueprint, abort, render_template, request
+from quart import Blueprint, abort, g, render_template, request
 
 from ..core import capture_waitlist_email, csrf_protect, feature_gate, fetch_all, fetch_one
 from ..i18n import get_translations
@@ -172,11 +172,14 @@ async def market_results():
 
 
 async def _filter_articles(q: str, country: str, region: str) -> list[dict]:
-    """Query published articles with optional FTS + country/region filters."""
+    """Query published articles for the current language."""
+    lang = g.get("lang", "en")
     if q:
         # FTS query
         wheres = ["articles_fts MATCH ?"]
         params: list = [q]
+        wheres.append("a.language = ?")
+        params.append(lang)
         if country:
             wheres.append("a.country = ?")
             params.append(country)
@@ -194,8 +197,8 @@ async def _filter_articles(q: str, country: str, region: str) -> list[dict]:
             tuple(params),
         )
     else:
-        wheres = ["status = 'published'", "published_at <= datetime('now')"]
-        params = []
+        wheres = ["status = 'published'", "published_at <= datetime('now')", "language = ?"]
+        params = [lang]
         if country:
             wheres.append("country = ?")
             params.append(country)
@@ -218,12 +221,13 @@ async def _filter_articles(q: str, country: str, region: str) -> list[dict]:
 async def article_page(url_path: str):
     """Serve a published article by its url_path."""
     clean_path = "/" + url_path.strip("/")
+    lang = g.get("lang", "en")
 
     article = await fetch_one(
         """SELECT * FROM articles
-           WHERE url_path = ? AND status = 'published'
+           WHERE url_path = ? AND language = ? AND status = 'published'
            AND published_at <= datetime('now')""",
-        (clean_path,),
+        (clean_path, lang),
     )
     if not article:
         abort(404)

web/src/padelnomics/worker.py

@@ -756,6 +756,9 @@ async def run_worker(poll_interval: float = 1.0) -> None:
     """Main worker loop."""
     print("[WORKER] Starting...")
     await init_db()
+    from .analytics import open_analytics_db
+    open_analytics_db()
+    print("[WORKER] Analytics DB opened.")
 
     while True:
         try: