🐛(agent) restore missing system deps in Docker image

Some system dependencies were unexpectedly missing, causing the
LiveKit agent framework to fail at runtime.

Install the required dependencies based on runtime error logs.
This fixes Docker image failures in the remote (staging) environment.

src/agents/Dockerfile

@@ -1,5 +1,11 @@
 FROM python:3.13-slim AS base
 
+# Install system dependencies required by LiveKit
+RUN apt-get update && apt-get install -y \
+    libglib2.0-0 \
+    libgobject-2.0-0 \
+    && rm -rf /var/lib/apt/lists/*
+
 FROM base AS builder
 
 WORKDIR /builder