feat(scheduler): in-process matching scheduler with audit + admin endpoints

- Add in-process scheduler service triggered by ENABLE_SCHEDULER
- Record runs in new matching_runs table; throttle per-event and log stats
- Add admin endpoints: POST /api/admin/events/:slug/run-now and GET /api/admin/events/:slug/matching-runs
- Wire scheduler start/stop in server and add ENV flags + compose defaults
- Prisma schema: add MatchingRun model and relation
- Update env examples for scheduler configuration

backend/.repl_history

@@ -1,4 +1,14 @@
 .cli users:list
+.cli users:lit
+.cli help
+.cli
+.cli users:verify --email test@radziel.com
+users:verify --email test@radziel.com
+.cli users:create --email test@radziel.com --username radziel --password QWEqwe123 --first Radek --last Gie
+.cli users
+.cli uers
+.cli
+.cli users:list
 .cli users:create --email test@radziel.com --username radziel --password QWEqwe123 --first Radek --last Gierwialo
 .cli users:verify --email test@radziel.com
 .cli users:create --email test@radziel.com --username radziel --password QWEqwe123 --first Radek --last Gierwialo
@@ -17,14 +27,4 @@ clear
 .cli
 .cli events
 .events:
-events:
-events:lists
-events:list
-users
-event:let
-:
-event
-.
-help
-.exity
-.cli events:import:worldsdc --dry-run --limit 20
+events: