feat: BackupService real pg_dump, OrganisationService region stats, SystemConfigService overrides
- BackupService: DB-persisted metadata (BackupRecord/BackupConfig entities + V16 Flyway migration),
real pg_dump execution via ProcessBuilder, soft-delete on deleteBackup, pg_restore manual guidance
- OrganisationService: repartitionRegion now queries Adresse entities (was Map.of() stub)
- SystemConfigService: in-memory config overrides via AtomicReference (no DB dependency)
- SystemMetricsService: null-guard on MemoryMXBean in getSystemStatus() (fixes test NPE)
- Souscription workflow: SouscriptionService, SouscriptionResource, FormuleAbonnementRepository,
V11 Flyway migration, admin REST clients
- Flyway V8-V15: notes membres, types référence, type orga constraint, seed roles,
première connexion, Wave checkout URL, Wave telephone column length fix
- .gitignore: added uploads/ and .claude/
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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