FEAT: Starting on medical information repository.

REFACTOR: Improve chat pipeline.

Merge remote changes and resolve chat endpoint conflicts

Upd api endpoint from chat to session/chat

Merge branch 'main' of hf.co:spaces/MedAI-COS30018/MedicalDiagnosisSystem into hf_main

Minor fixes to models

For old persisted schema that may not adapted with new scheme, add migration service that auto apply mismatch. Upd titile tag and bold bubble as external UI rendering strats

Make account schema's last_seen being optional (for old accounts from db avoid crash) + Auto enpopulate data for data unavailability

Solve field mismatch ethinicity in patient profile

Moving emr stuff into the correct project structure

Updating session route.

Updating patient routes

Updating account routes

Undoing model combining.

Moving medical models into combined model file

Upgraded and reworked medical repo file.

Combining repository models into one file

Utilising pydantic models for data access layer operations.

Updated sessions.

Updated patient.

Unifying doctors and users routes as accounts

Merging duplicate functions in account

Corrected routes.

Upd pydantic model

Upd doctor Pydantic profile and Mongo conn

Update the app connection to MongoDB user storage + chat history LTM/STM. Distinguish patient/doctor roles on chat session

Adding file info at the top of each file

Fixing incorrect spelling

Restrucuted project.