feat(#131): fiches parent/AM éditable, placement AM↔enfant, statuts garde/sans_garde

Squash merge develop → master.

- Fiche parent éditable (co-parent, PATCH fiche, GET /parents)
- Fiche AM 3 onglets (PATCH fiche, rattacher/détacher enfants)
- Table enfants_assistantes_maternelles + enum garde/sans_garde
- Migration SQL + BDD.sql canonique
- Correctifs recette : @Get() parents, DTO fiche AM, fix NIR

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

backend/src/common/utils/sanitize-user-for-api.spec.ts

@@ -0,0 +1,32 @@
+import { sanitizeUserForApi } from './sanitize-user-for-api';
+import { RoleType, StatutUtilisateurType, Users } from '../../entities/users.entity';
+
+describe('sanitizeUserForApi', () => {
+  const base: Users = {
+    id: 'u1',
+    email: 'a@b.fr',
+    prenom: 'Paul',
+    nom: 'Parent',
+    role: RoleType.PARENT,
+    statut: StatutUtilisateurType.ACTIF,
+    password: 'hash',
+    token_creation_mdp: 'tok',
+    token_creation_mdp_expire_le: new Date(),
+    password_reset_token: 'rst',
+    password_reset_expires: new Date(),
+  } as Users;
+
+  it('retire password et tokens', () => {
+    const out = sanitizeUserForApi(base)!;
+    expect(out.prenom).toBe('Paul');
+    expect(out.nom).toBe('Parent');
+    expect(out.password).toBeUndefined();
+    expect(out.token_creation_mdp).toBeUndefined();
+    expect(out.password_reset_token).toBeUndefined();
+  });
+
+  it('retourne undefined si user absent', () => {
+    expect(sanitizeUserForApi(null)).toBeUndefined();
+    expect(sanitizeUserForApi(undefined)).toBeUndefined();
+  });
+});