fix: add agent key auth for ingest endpoints

examples/docker/java-instrumented/Dockerfile

@@ -0,0 +1,43 @@
+# ═══════════════════════════════════════════════════════════
+# 🐍 OPHION - Java Instrumented App Dockerfile
+# Example showing how to add OpenTelemetry to any Java app
+# ═══════════════════════════════════════════════════════════
+
+# Build stage
+FROM eclipse-temurin:21-jdk-alpine AS builder
+
+WORKDIR /app
+
+# Copy Maven/Gradle files (if using build tool)
+COPY pom.xml* build.gradle* ./
+
+# Copy source code
+COPY src/ ./src/
+
+# For simple example, compile directly
+RUN mkdir -p target/classes && \
+    javac -d target/classes src/main/java/*.java
+
+# Package as JAR
+RUN cd target/classes && \
+    jar cfe ../app.jar Main .
+
+# Runtime stage
+FROM eclipse-temurin:21-jre-alpine
+
+WORKDIR /app
+
+# Download OpenTelemetry Java Agent
+ARG OTEL_AGENT_VERSION=2.1.0
+RUN wget -q https://github.com/open-telemetry/opentelemetry-java-instrumentation/releases/download/v${OTEL_AGENT_VERSION}/opentelemetry-javaagent.jar \
+    -O /opt/opentelemetry-javaagent.jar
+
+# Copy the built application
+COPY --from=builder /app/target/app.jar .
+
+# Expose port
+EXPOSE 8080
+
+# Start with OpenTelemetry Java Agent
+# The JAVA_TOOL_OPTIONS env var in docker-compose.yml enables the agent
+CMD ["java", "-jar", "app.jar"]