fix(docker): remove --no-install-project flag to fix uvicorn import error

The --no-install-project flag causes uv to skip installing dependencies
when package = false is set in pyproject.toml, resulting in
ModuleNotFoundError for uvicorn at container startup.

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Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

Author: 3 people

Dockerfile

@@ -8,7 +8,7 @@ ENV UV_LINK_MODE=copy
 
 # Install dependencies (cached layer)
 COPY backend/pyproject.toml backend/uv.lock ./
-RUN uv sync --frozen --no-dev --no-install-project
+RUN uv sync --frozen --no-dev
 
 # Copy application source
 COPY backend/src ./src