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>

.agent/workflows/bmad-cis-problem-solving.md

@@ -0,0 +1,15 @@
+---
+name: 'problem-solving'
+description: 'Apply systematic problem-solving methodologies to crack complex challenges. This workflow guides through problem diagnosis, root cause analysis, creative solution generation, evaluation, and implementation planning using proven frameworks.'
+disable-model-invocation: true
+---
+
+IT IS CRITICAL THAT YOU FOLLOW THESE STEPS - while staying in character as the current agent persona you may have loaded:
+
+<steps CRITICAL="TRUE">
+1. Always LOAD the FULL @{project-root}/_bmad/core/tasks/workflow.xml
+2. READ its entire contents - this is the CORE OS for EXECUTING the specific workflow-config @{project-root}/_bmad/cis/workflows/problem-solving/workflow.yaml
+3. Pass the yaml path @{project-root}/_bmad/cis/workflows/problem-solving/workflow.yaml as 'workflow-config' parameter to the workflow.xml instructions
+4. Follow workflow.xml instructions EXACTLY as written to process and follow the specific workflow config and its instructions
+5. Save outputs after EACH section when generating any documents from templates
+</steps>