feat: production deployment - full update with providers, admin, glossaries, pricing, tests

Major changes across backend, frontend, infrastructure:
- Provider system with model selection (Google, DeepL, OpenAI, Ollama, Google Cloud)
- Admin panel: user management, pricing, settings
- Glossary system with CSV import/export
- Subscription and tier quota management
- Security hardening (rate limiting, API key auth, path traversal fixes)
- Docker compose for dev, prod, and IONOS deployment
- Alembic migrations for new tables
- Frontend: dashboard, pricing page, landing page, i18n (en/fr)
- Test suite and verification scripts

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

_bmad-output/planning-artifacts/prd-validation-report.md

@@ -0,0 +1,74 @@
+---
+validationTarget: '_bmad-output/planning-artifacts/prd.md'
+validationDate: '2026-02-18'
+inputDocuments:
+  - product-brief-office_translator-2026-02-18.md
+validationStepsCompleted:
+  - step-v-01-discovery
+  - step-v-02-format-detection
+  - step-v-03-density-validation
+  - step-v-04-brief-coverage-validation
+  - step-v-05-measurability-validation
+  - step-v-06-traceability-validation
+  - step-v-07-implementation-leakage-validation
+  - step-v-08-domain-compliance-validation
+  - step-v-09-project-type-validation
+  - step-v-10-smart-validation
+  - step-v-11-holistic-quality-validation
+  - step-v-12-completeness-validation
+validationStatus: COMPLETE
+holisticQualityRating: '5/5'
+overallStatus: PASS
+---
+
+# PRD Validation Report
+
+**PRD Being Validated:** _bmad-output/planning-artifacts/prd.md
+**Validation Date:** 2026-02-18
+
+## Input Documents
+
+- PRD: prd.md
+- Product Brief: product-brief-office_translator-2026-02-18.md
+
+## Validation Summary
+
+### Quick Results
+
+| Check | Status |
+|-------|--------|
+| Format Detection | ✓ BMAD Standard (6/6 core sections) |
+| Information Density | ✓ Pass (0 violations) |
+| Product Brief Coverage | ✓ Pass (all key content covered) |
+| Measurability | ✓ Pass (0 violations) |
+| Traceability | ✓ Pass (0 orphans) |
+| Implementation Leakage | ✓ Pass (0 violations) |
+| Domain Compliance | ✓ Pass (appropriate for B2B SaaS) |
+| Project-Type Compliance | ✓ Pass (100%) |
+| SMART Requirements | ✓ Pass (100% at 5/5) |
+| Holistic Quality | ✓ Excellent (5/5) |
+| Completeness | ✓ Pass (100%) |
+
+### Critical Issues: None
+
+### Warnings: None
+
+### Strengths
+- Vision claire avec insight unique (élimination du travail post-traduction)
+- 66 FRs précises, mesurables et traçables
+- 21 NFRs avec critères spécifiques
+- 4 User Journeys couvrant tous les personas
+- Structure BMAD Standard complète
+- Zero anti-patterns ou fuite d'implémentation
+- Documentation de domaine appropriée (RGPD, confidentialité)
+
+### Holistic Quality: 5/5 - Excellent
+
+### Top 3 Improvements
+1. Ajouter un glossaire de termes techniques
+2. Inclure un diagramme d'architecture visuel
+3. Documenter les dépendances entre FRs
+
+### Recommendation
+PRD is in excellent shape. The document is ready for downstream work (Architecture, UX, Epics). Consider the minor improvements above to make it even better.
+