feat: add MFA/TOTP auth, PII encryption, agents/leads/inquiries modules, and comprehensive tests

- Add TOTP-based MFA with setup, verify, disable, backup codes, and challenge flow
- Add PII field encryption middleware with AES-256-GCM and deterministic search hashes
- Add agents, inquiries, and leads domain modules with entities, events, value objects
- Add web dashboard pages for inquiries and leads with detail dialogs
- Add 30+ component tests (valuation, charts, listings, search, providers, UI)
- Add Prisma migrations for encryption hash columns and MFA TOTP support
- Fix all ESLint errors (unused imports, duplicate imports, lint auto-fixes)
- Update dependencies and lock file
- Clean up obsolete exploration/QA docs, add audit documentation

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/api/src/modules/leads/application/index.ts

@@ -0,0 +1,5 @@
+export { CreateLeadCommand } from './commands/create-lead/create-lead.command';
+export { UpdateLeadStatusCommand } from './commands/update-lead-status/update-lead-status.command';
+export { DeleteLeadCommand } from './commands/delete-lead/delete-lead.command';
+export { GetLeadsByAgentQuery } from './queries/get-leads-by-agent/get-leads-by-agent.query';
+export { GetLeadStatsQuery } from './queries/get-lead-stats/get-lead-stats.query';

apps/api/src/modules/leads/domain/entities/index.ts

@@ -0,0 +1 @@
+export { LeadEntity, type LeadProps, type LeadStatus } from './lead.entity';

apps/api/src/modules/leads/domain/events/index.ts

@@ -0,0 +1,2 @@
+export { LeadCreatedEvent } from './lead-created.event';
+export { LeadStatusChangedEvent } from './lead-status-changed.event';

apps/api/src/modules/leads/domain/index.ts

@@ -0,0 +1,4 @@
+export * from './entities';
+export * from './value-objects';
+export * from './events';
+export * from './repositories';

apps/api/src/modules/leads/domain/repositories/index.ts

@@ -0,0 +1,7 @@
+export {
+  LEAD_REPOSITORY,
+  type ILeadRepository,
+  type PaginatedResult,
+  type LeadStatsData,
+} from './lead.repository';
+export { type LeadReadDto } from './lead-read.dto';

apps/api/src/modules/leads/domain/value-objects/index.ts

@@ -0,0 +1 @@
+export { LeadScore } from './lead-score.vo';