Add EvoSync v3 environment scaffold

FastAPI + Celery + Redis + MariaDB stack with 6-service docker-compose.
Includes project skeleton (config, database, models, tasks, migrations)
and health endpoint with passing test.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

requirements.txt

@@ -1,13 +1,20 @@
-fastapi==0.115.0
-uvicorn[standard]==0.30.0
-sqlalchemy==2.0.35
-pymysql==1.1.1
-cryptography>=41.0.0
-jinja2==3.1.4
+fastapi==0.115.5
+uvicorn[standard]==0.32.1
 python-multipart==0.0.12
+jinja2==3.1.4
+sqlalchemy==2.0.36
+alembic==1.14.0
+pymysql==1.1.1
+cryptography>=44.0.0
 passlib[bcrypt]==1.7.4
-bcrypt==4.2.0
-pydantic-settings==2.5.2
-itsdangerous==2.1.2
-httpx==0.27.2
-alembic==1.13.3
+bcrypt==4.2.1
+pydantic-settings==2.6.1
+httpx==0.28.1
+celery[redis]==5.4.0
+redis==5.2.1
+flower==2.0.1
+python-json-logger==3.2.1
+pytest==8.3.4
+pytest-asyncio==0.24.0
+pytest-cov==6.0.0
+factory-boy==3.3.1