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/workspace.py

@@ -160,7 +160,7 @@ async def add_comment(request: Request, page_id: int):
     try:
         await fire_event("comment.added", {"comment_id": cur.lastrowid, "page_id": page_id, "user_id": uid})
     except Exception:
-        pass
+        logger.exception("add_comment")
     return {"id": cur.lastrowid, "status": "created"}
 
 
@@ -180,7 +180,7 @@ async def update_comment(request: Request, comment_id: int):
         try:
             await fire_event("comment.resolved", {"comment_id": comment_id, "page_id": row["page_id"]})
         except Exception:
-            pass
+            logger.exception("update_comment")
     return {"status": "updated"}
 
 
@@ -246,7 +246,7 @@ async def add_favorite(request: Request):
     try:
         await fire_event("favorite.added", {"page_id": page_id, "collection_id": collection_id, "user_id": uid})
     except Exception:
-        pass
+        logger.exception("add_favorite")
     return {"status": "favorited"}
 
 
@@ -493,7 +493,7 @@ async def create_sprint(request: Request, collection_id: int):
     try:
         await fire_event("sprint.created", {"sprint_id": cur.lastrowid, "collection_id": collection_id, "name": name})
     except Exception:
-        pass
+        logger.exception("create_sprint")
     return {"id": cur.lastrowid, "name": name, "status": "created"}
 
 
@@ -523,7 +523,7 @@ async def update_sprint(request: Request, collection_id: int, sid: int):
     try:
         await fire_event("sprint.updated", {"sprint_id": sid, "collection_id": collection_id, "name": name, "status": status})
     except Exception:
-        pass
+        logger.exception("update_sprint")
     return {"id": sid, "status": "updated"}