Audit and Update All Project Documentation

[berffdnlr]

Review and update all project documentation so that it accurately reflects the current AI Travel Planner implementation, architecture, local setup, deployment, CI/CD, monitoring, APIs, and contribution workflow.

The documentation currently contains outdated architecture descriptions, missing monitoring information, inconsistent startup commands, duplicated setup instructions, and references to services or endpoints that do not match the current implementation.

Current System

The documentation must reflect the currently implemented system:

• React frontend
• Spring Boot Auth Service
• Spring Boot Trip Service
• Shared backend Common module
• Python/FastAPI GenAI Service
• PostgreSQL
• NGINX API Gateway
• Docker Compose
• Prometheus
• Grafana
• GitHub Actions CI/CD
• Kubernetes and Helm deployment
• Terraform and Ansible infrastructure automation

Acceptance Criteria

• All maintained Markdown documentation files have been reviewed
• Root README reflects the current repository and architecture
• System overview reflects the implemented services
• Planned and implemented features are clearly separated
• Local launch instructions work from a clean checkout
• Environment file location is consistent
• Docker Compose commands are consistent
• API Gateway routes are consistent
• Service ports and URLs are consistent
• Prometheus configuration and targets are documented
• Grafana datasource and dashboard are documented
• GenAI endpoints and provider configuration are current
• CI/CD documentation matches the current workflows
• Helm, Kubernetes, Terraform, and Ansible documentation is current
• Contribution rules match the actual Git workflow
• Outdated architecture descriptions are removed or marked as future work
• Duplicate instructions are reduced
• Internal Markdown links work
• No secrets or private credentials are included
• Documentation changes are reviewed for grammar and formatting