feat: implement whatsapp templates management with security hardening, audit logs, and crm integration

fix: implement compatible logger wrapper to resolve project-wide TS errors

fix: restore logger compatibility and fix major TS errors in services

fix: correct pino transport syntax and cleanup logging types

feat: implement Phase 4 (Quota management, centralized logging, and env sync)

feat: B2B SaaS Multi-tenant architecture & Tech Debt Resolution

chore: major tech debt cleanup v2.1 - Type Safety & Observability

Refactor: Technical Debt Repayment (Clean Dashboard, Strict Typing, Pino Logging, SQL Migration)