Update architecture documentation with project history

Added project history and engineering logs section with a link to full development notes.

Author: AasthathecoderX

docs/architecture.md

@@ -67,6 +67,8 @@ Each backend service internally follows Clean Architecture:
 `api/` (routes) -> `services/` (business logic) -> `repositories/` (DB access)
 -> `models/` (SQLAlchemy) with `schemas/` (Pydantic) for I/O validation.
 
-## Roadmap
-See Phase 0–19 list in project planning notes. Each phase produces a working,
-tested increment.
+
+## Project History & Engineering Logs
+This system was built incrementally across 19 distinct phases.
+- **[View Full Phase-by-Phase Development Notes](https://your-drive-link-here)**
+  * Contains raw research, initial phase plans, and detailed troubleshooting steps used during the "vibe coding" process.