feat(automations): moteur de regles if-this-then-that (v5.1.0 roadmap, bump v5.2.0)

Moteur d'automatisation complet : declencheurs (evenement / cron / bouton),
conditions combinables (eq, neq, contains, is_empty, is_not_empty, changed)
et actions (webhook, set_property, create_page, notify).

- Migration v5 : tables `automations` + `automation_runs` (avec index).
- Service `app/services/automations.py` : fire_event, cron_due (`*/N`,
  minute fixe, @hourly/@daily), scheduler de fond dans le lifespan.
- Router `app/routers/automations.py` : CRUD `/workspace/automations`,
  historique des executions, run manuel + run bouton `/api/automations/{id}/run`
  (exempt CSRF, comme `/api/agent`).
- Hooks d'evenements dans collections.py / board.py / workspace.py
  (collection.* et page.* : created/updated/deleted/moved).
- Bloc `button` dans l'editeur (menu slash) : declenche une regle au clic,
  picker d'automation inline, serialisation automations_id/name.
- Panneau Automations dans le Settings (creer/editer/activer/desactiver/
  lancer/supprimer + historique), collection scope + JSON conditions/actions.
- 11 tests `tests/test_automations.py` ; suite complete pytest 289 verte.
- Version bump 5.2.0 (VERSION, app/main.py, CHANGELOG).

app/routers/collections.py

@@ -12,6 +12,7 @@ from app.db import get_conn
 from app.auth.session import SessionManager
 from app.services.property_types import validate_property_rule
 from app.services.db_templates import materialize_properties
+from app.services.automations import fire_event
 
 logger = logging.getLogger(__name__)
 router = APIRouter(tags=["collections"], prefix="/db")
@@ -162,6 +163,7 @@ async def create_collection_api(request: Request):
         )
         conn.commit()
 
+    await fire_event("collection.created", {"collection_id": collection_id, "name": name, "icon": icon})
     return {"id": collection_id, "name": name, "status": "created"}
 
 
@@ -200,6 +202,7 @@ async def update_collection_api(request: Request, collection_id: int):
         )
         conn.commit()
 
+    await fire_event("collection.updated", {"collection_id": collection_id, "name": name})
     return {"id": collection_id, "status": "updated"}
 
 
@@ -216,6 +219,8 @@ async def delete_collection_api(request: Request, collection_id: int):
         conn.execute("DELETE FROM collections WHERE id=?", (collection_id,))
         conn.commit()
 
+    await fire_event("collection.deleted", {"collection_id": collection_id,
+                                           "name": existing["name"] if existing else ""})
     return {"id": collection_id, "status": "deleted"}
 
 
@@ -276,6 +281,13 @@ async def update_page_api(request: Request, page_id: int):
         )
         conn.commit()
 
+    await fire_event("page.updated", {
+        "page_id": page_id,
+        "collection_id": existing["collection_id"],
+        "title": title,
+        "icon": icon,
+        "properties": props,
+    })
     return {"id": page_id, "status": "updated"}
 
 
@@ -292,6 +304,11 @@ async def delete_page_api(request: Request, page_id: int):
         conn.execute("DELETE FROM collection_pages WHERE id=?", (page_id,))
         conn.commit()
 
+    await fire_event("page.deleted", {
+        "page_id": page_id,
+        "collection_id": existing["collection_id"],
+        "title": existing["title"],
+    })
     return {"id": page_id, "status": "deleted"}
 
 
@@ -754,8 +771,16 @@ async def create_sub_item(request: Request, collection_id: int, page_id: int):
             (collection_id, title, page_id, max_pos, json.dumps(body.get("properties", {}))),
         )
         conn.commit()
+        new_id = cur.lastrowid
 
-    return {"id": cur.lastrowid, "title": title, "parent_id": page_id, "status": "created"}
+    await fire_event("page.created", {
+        "page_id": new_id,
+        "collection_id": collection_id,
+        "parent_id": page_id,
+        "title": title,
+        "properties": body.get("properties", {}),
+    })
+    return {"id": new_id, "title": title, "parent_id": page_id, "status": "created"}
 
 
 @router.get("/{collection_id}/pages/{page_id}/status-aggregate")
@@ -1897,4 +1922,11 @@ async def create_page_api(request: Request, collection_id: int):
         conn.commit()
         page_id = cur.lastrowid
 
+    await fire_event("page.created", {
+        "page_id": page_id,
+        "collection_id": collection_id,
+        "title": title,
+        "icon": icon,
+        "properties": property_values,
+    })
     return {"id": page_id, "title": title, "status": "created"}