fix: A25 + A21 (partiel) — plus d'exception muque, transaction protégée (v7.3.8)

- A25 — 84 `except Exception: pass/…` → `logger.exception("<fonction>")`
  (19 fichiers : api_v2 30, dashboard 10, board 7, sites 5, workspace 5,
  api_v2_helpers 5, …) ; `logger` ajouté là où il manquait (api_v2_helpers,
  sites + `import logging`)
- A25 critique — les `try` autour de `materialize_properties` supprimés dans
  `create_collection_v2` ET `apply_db_template_v2` : un échec interrompt la
  transaction au lieu de commiter une collection sans schéma
- test `test_collection_rollback_when_materialize_fails` (Bearer v2, monkeypatch
  qui lève, assertions : RuntimeError + 0 ligne commitée)
- A21 partiel — `PRAGMA busy_timeout=5000` dans `get_conn()` (point d'entrée
  unique) ; commentaire `ponytail:` : le wrapper async + les 510 call sites
  restent à migrer module par module
- suite **1028/1028** · `ruff check app tests` OK

app/routers/board.py

@@ -695,7 +695,7 @@ def _sidebar_data(request: Request, owner: str = "", repo: str = "") -> dict:
                             local_ws_id = row["id"]
                             workspace_pages = _load_workspace_pages(str(local_ws_id))
                 except Exception:
-                    pass
+                    logger.exception("_sidebar_data")
     elif ws_cookie and user:
         try:
             wsi = int(ws_cookie)
@@ -781,7 +781,7 @@ def _sidebar_data(request: Request, owner: str = "", repo: str = "") -> dict:
                     elif t["provider"] == "github":
                         github_linked = True
         except Exception:
-            pass
+            logger.exception("_sidebar_data")
 
     return {"workspace_name": ws_name, "workspace_initial": ws_name[0].upper() if ws_name else "B",
             "active_ws_name": active_ws_name,
@@ -982,7 +982,7 @@ async def add_favorite(request: Request, page_id: int):
     try:
         await fire_event("favorite.added", {"page_id": page_id, "user_id": uid})
     except Exception:
-        pass
+        logger.exception("add_favorite")
     return {"status": "added", "page_id": page_id}
 
 
@@ -997,7 +997,7 @@ async def remove_favorite(request: Request, page_id: int):
     try:
         await fire_event("favorite.removed", {"page_id": page_id, "user_id": uid})
     except Exception:
-        pass
+        logger.exception("remove_favorite")
     return {"status": "removed", "page_id": page_id}
 
 # ═══════════ Share API ═══════════
@@ -1032,7 +1032,7 @@ async def publish_page(request: Request, page_id: int):
     try:
         await fire_event("page.published", {"page_id": page_id, "slug": slug})
     except Exception:
-        pass
+        logger.exception("publish_page")
     return {"is_published": True, "publish_slug": slug, "title": row["title"] if row else ""}
 
 
@@ -1048,7 +1048,7 @@ async def unpublish_page(request: Request, page_id: int):
     try:
         await fire_event("page.unpublished", {"page_id": page_id})
     except Exception:
-        pass
+        logger.exception("unpublish_page")
     return {"is_published": False}
 
 
@@ -1069,7 +1069,7 @@ async def restore_page(request: Request, page_id: int):
     try:
         await fire_event("page.restored", {"page_id": page_id})
     except Exception:
-        pass
+        logger.exception("restore_page")
     return {"status": "ok", "restored": page_id}