feat: add Gemini API key management for users, including new endpoints for API key retrieval and update, and integrate API key usage in AI exam generation process

Author: gainsborouo

backend/Dockerfile

@@ -20,4 +20,5 @@ ENV PATH="/app/.venv/bin:$PATH"
 ENTRYPOINT []
 
 # CMD ["fastapi", "dev", "--host", "0.0.0.0", "main.py", "--root-path", "/api"]
-CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--root-path", "/api"]
+CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--root-path", "/api", "--workers", "4"]
+

backend/alembic/versions/850cafd2d390_add_gemini_api_key_to_user.py

@@ -0,0 +1,33 @@
+"""add_gemini_api_key_to_user
+
+Revision ID: 850cafd2d390
+Revises: e353baf54db9
+Create Date: 2025-10-05 00:23:47.362879
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+import sqlmodel.sql.sqltypes
+
+
+# revision identifiers, used by Alembic.
+revision: str = '850cafd2d390'
+down_revision: Union[str, Sequence[str], None] = 'e353baf54db9'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('users', sa.Column('gemini_api_key', sqlmodel.sql.sqltypes.AutoString(), nullable=True))
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('users', 'gemini_api_key')
+    # ### end Alembic commands ###

backend/app/api/api.py

@@ -1,6 +1,6 @@
 from fastapi import APIRouter
 
-from app.api.services import auth, courses, archives, meme, users, statistics
+from app.api.services import auth, courses, archives, meme, users, statistics, ai_exam
 
 api_router = APIRouter()
 
@@ -9,4 +9,5 @@
 api_router.include_router(archives.router, prefix="/archives", tags=["archives"])
 api_router.include_router(users.router, prefix="/users", tags=["users"])
 api_router.include_router(meme.router, tags=["meme"])
-api_router.include_router(statistics.router, tags=["statistics"]) 
+api_router.include_router(statistics.router, tags=["statistics"])
+api_router.include_router(ai_exam.router, prefix="/ai-exam", tags=["ai-exam"])