Update userwallet components, services and documentation
**Motivations:**
- Add new features and fixes for userwallet application
- Update documentation for pairing, login state machine, and sync
- Add new utilities for bloom filters, nonce store, and contract versioning
- Fix mempool websocket offline issues
**Root causes:**
- N/A (feature additions and improvements)
**Correctifs:**
- Fix mempool websocket offline handling
- Update ESLint configuration
**Evolutions:**
- Add login state machine service and hook
- Add sync loop service
- Add bloom filter utilities for anti-replay and state visibility
- Add nonce store and contract version utilities
- Update pairing confirmation and graph resolver services
- Add new documentation for features and fixes
- Update userwallet components (LoginScreen, SyncScreen)
- Update types for contract, identity, and messages
**Pages affectées:**
- userwallet/src/components/LoginScreen.tsx
- userwallet/src/components/SyncScreen.tsx
- userwallet/src/hooks/useChannel.ts
- userwallet/src/hooks/useLoginStateMachine.ts (new)
- userwallet/src/services/graphResolver.ts
- userwallet/src/services/pairingConfirm.ts
- userwallet/src/services/syncService.ts
- userwallet/src/services/syncLoop.ts (new)
- userwallet/src/services/loginStateMachine.ts (new)
- userwallet/src/types/contract.ts
- userwallet/src/types/identity.ts
- userwallet/src/types/message.ts
- userwallet/src/utils/canonical.ts
- userwallet/src/utils/identity.ts
- userwallet/src/utils/indexedDbStorage.ts
- userwallet/src/utils/relay.ts
- userwallet/src/utils/verification.ts
- userwallet/src/utils/bloom.ts (new)
- userwallet/src/utils/contractVersion.ts (new)
- userwallet/src/utils/nonceStore.ts (new)
- userwallet/eslint.config.mjs
- userwallet/package.json
- userwallet/package-lock.json
- userwallet/docs/synthese.md
- userwallet/docs/specs-champs-obligatoires-cnil.md (new)
- api-relay/README.md
- features/userwallet-pairing-words-only-finalise.md
- features/userwallet-anti-rejeu-etats-visibles-bloom.md (new)
- features/userwallet-bloom-usage-sync.md (new)
- features/userwallet-contrat-login-reste-a-faire.md (new)
- features/userwallet-ecrans-login-a-valider.md (new)
- features/userwallet-eslint-fix.md (new)
- features/userwallet-login-state-machine.md (new)
- features/userwallet-validation-conformite.md (new)
- fixKnowledge/mempool-websocket-offline-fix.md (new)
- mempool (submodule)
- hash_list.txt
- hash_list_cache.txt
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