feat(#205): renommer absences_garde → evenements_agenda

Migration live + BDD.sql from-scratch, module Nest / API
/evenements-agenda, FK cartes id_evenement. Front stub path aligné.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/src/modules/cards/cards.module.ts

@@ -2,7 +2,7 @@ import { Module } from '@nestjs/common';
 import { ConfigModule, ConfigService } from '@nestjs/config';
 import { JwtModule } from '@nestjs/jwt';
 import { TypeOrmModule } from '@nestjs/typeorm';
-import { AbsencesGardeModule } from '../absences-garde';
+import { EvenementsAgendaModule } from '../evenements-agenda';
 import { CardType } from 'src/entities/card_types.entity';
 import { CardInstance } from 'src/entities/card_instances.entity';
 import { CardAudienceMember } from 'src/entities/card_audience_members.entity';
@@ -16,7 +16,7 @@ import { CardsRealtimeService } from './cards-realtime.service';
 
 @Module({
   imports: [
-    AbsencesGardeModule,
+    EvenementsAgendaModule,
     TypeOrmModule.forFeature([
       CardType,
       CardInstance,