feat: enhance database transactions, add Makefiles, and improve Docker setup

- Refactored database batch operations to ensure transaction atomicity and simplify nested structure.
- Added `Makefile` for `knowledge-base` and `llm-gateway` modules to streamline development workflows.
- Simplified `Dockerfile` for `llm-gateway` by removing multi-stage builds and optimizing dependencies.
- Improved code readability in `collection_manager` and `failover` modules with refined logic.
- Minor fixes in `test_server` and Redis health check handling for better diagnostics.

mcp-servers/llm-gateway/Dockerfile

@@ -1,39 +1,25 @@
 # Syndarix LLM Gateway MCP Server
-# Multi-stage build for minimal image size
+FROM python:3.12-slim
 
-# Build stage
-FROM python:3.12-slim AS builder
+WORKDIR /app
+
+# Install system dependencies (needed for tiktoken regex compilation)
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    build-essential \
+    && rm -rf /var/lib/apt/lists/*
 
 # Install uv for fast package management
-COPY --from=ghcr.io/astral-sh/uv:latest /uv /usr/local/bin/uv
+COPY --from=ghcr.io/astral-sh/uv:latest /uv /bin/uv
 
-WORKDIR /app
-
-# Copy dependency files
+# Copy project files
 COPY pyproject.toml ./
+COPY *.py ./
 
-# Create virtual environment and install dependencies
-RUN uv venv /app/.venv
-ENV PATH="/app/.venv/bin:$PATH"
-RUN uv pip install -e .
-
-# Runtime stage
-FROM python:3.12-slim AS runtime
+# Install dependencies to system Python
+RUN uv pip install --system --no-cache .
 
 # Create non-root user for security
-RUN groupadd --gid 1000 appgroup && \
-    useradd --uid 1000 --gid appgroup --shell /bin/bash --create-home appuser
-
-WORKDIR /app
-
-# Copy virtual environment from builder
-COPY --from=builder /app/.venv /app/.venv
-ENV PATH="/app/.venv/bin:$PATH"
-
-# Copy application code
-COPY --chown=appuser:appgroup . .
-
-# Switch to non-root user
+RUN useradd --create-home --shell /bin/bash appuser
 USER appuser
 
 # Environment variables
@@ -47,7 +33,7 @@ EXPOSE 8001
 
 # Health check
 HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
-    CMD python -c "import httpx; httpx.get('http://localhost:8001/health').raise_for_status()" || exit 1
+    CMD python -c "import httpx; httpx.get('http://localhost:8001/health').raise_for_status()"
 
 # Run the server
 CMD ["python", "server.py"]