fix: install dependencies directly instead of building package

Hatchling couldn't find the package directory. Since we run the app
directly with uvicorn (not as an installed library), install deps
explicitly in Dockerfile.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Dockerfile

@@ -2,15 +2,15 @@ FROM python:3.13-slim
 
 WORKDIR /app
 
-# Install dependencies
+# Copy application first (needed for pip install)
 COPY pyproject.toml .
-RUN pip install --no-cache-dir .
-
-# Copy application
 COPY api/ api/
 COPY mcp_server/ mcp_server/
 COPY config/ config/
 
+# Install dependencies only (not the project itself)
+RUN pip install --no-cache-dir fastapi "uvicorn[standard]" httpx pydantic openai
+
 # Create data directory for skills/memory
 RUN mkdir -p /opt/data/skills /opt/data/memory