feat(backend): implement Relais module and relation with Gestionnaire (Ticket #94)

- Create Relais entity
- Create Relais module, controller, service with CRUD
- Update Users entity with ManyToOne relation to Relais
- Update GestionnairesService to handle relaisId

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

backend/src/routes/relais/relais.controller.ts

@@ -0,0 +1,57 @@
+import { Controller, Get, Post, Body, Patch, Param, Delete, UseGuards } from '@nestjs/common';
+import { RelaisService } from './relais.service';
+import { CreateRelaisDto } from './dto/create-relais.dto';
+import { UpdateRelaisDto } from './dto/update-relais.dto';
+import { ApiBearerAuth, ApiTags, ApiOperation, ApiResponse } from '@nestjs/swagger';
+import { AuthGuard } from 'src/common/guards/auth.guard';
+import { RolesGuard } from 'src/common/guards/roles.guard';
+import { Roles } from 'src/common/decorators/roles.decorator';
+import { RoleType } from 'src/entities/users.entity';
+
+@ApiTags('Relais')
+@ApiBearerAuth('access-token')
+@UseGuards(AuthGuard, RolesGuard)
+@Controller('relais')
+export class RelaisController {
+  constructor(private readonly relaisService: RelaisService) {}
+
+  @Post()
+  @Roles(RoleType.SUPER_ADMIN, RoleType.ADMINISTRATEUR)
+  @ApiOperation({ summary: 'Créer un relais' })
+  @ApiResponse({ status: 201, description: 'Le relais a été créé.' })
+  create(@Body() createRelaisDto: CreateRelaisDto) {
+    return this.relaisService.create(createRelaisDto);
+  }
+
+  @Get()
+  @Roles(RoleType.SUPER_ADMIN, RoleType.ADMINISTRATEUR)
+  @ApiOperation({ summary: 'Lister tous les relais' })
+  @ApiResponse({ status: 200, description: 'Liste des relais.' })
+  findAll() {
+    return this.relaisService.findAll();
+  }
+
+  @Get(':id')
+  @Roles(RoleType.SUPER_ADMIN, RoleType.ADMINISTRATEUR)
+  @ApiOperation({ summary: 'Récupérer un relais par ID' })
+  @ApiResponse({ status: 200, description: 'Le relais trouvé.' })
+  findOne(@Param('id') id: string) {
+    return this.relaisService.findOne(id);
+  }
+
+  @Patch(':id')
+  @Roles(RoleType.SUPER_ADMIN, RoleType.ADMINISTRATEUR)
+  @ApiOperation({ summary: 'Mettre à jour un relais' })
+  @ApiResponse({ status: 200, description: 'Le relais a été mis à jour.' })
+  update(@Param('id') id: string, @Body() updateRelaisDto: UpdateRelaisDto) {
+    return this.relaisService.update(id, updateRelaisDto);
+  }
+
+  @Delete(':id')
+  @Roles(RoleType.SUPER_ADMIN, RoleType.ADMINISTRATEUR)
+  @ApiOperation({ summary: 'Supprimer un relais' })
+  @ApiResponse({ status: 200, description: 'Le relais a été supprimé.' })
+  remove(@Param('id') id: string) {
+    return this.relaisService.remove(id);
+  }
+}