feat: Add HMMM traffic monitoring tool

Create standalone monitoring container that subscribes to all CHORUS
pub/sub topics and logs traffic in real-time for debugging and observability.

Features:
- Subscribes to chorus-bzzz, chorus-hmmm, chorus-context topics
- Logs all messages with timestamps and sender information
- Pretty-printed JSON output with topic-specific emojis
- Minimal resource usage (256MB RAM, 0.5 CPU)
- Read-only monitoring (doesn't publish messages)

Files:
- hmmm-monitor/main.go: Main monitoring application
- hmmm-monitor/Dockerfile: Multi-stage build for minimal image
- hmmm-monitor/docker-compose.yml: Swarm deployment config
- hmmm-monitor/README.md: Usage documentation

This tool helps debug council formation, task execution, and agent
coordination by providing visibility into all HMMM/Bzzz traffic.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

hmmm-monitor/Dockerfile

@@ -0,0 +1,41 @@
+FROM golang:1.22-alpine AS builder
+
+# Install build dependencies
+RUN apk add --no-cache git ca-certificates
+
+WORKDIR /app
+
+# Copy go mod files
+COPY go.mod go.sum* ./
+
+# Download dependencies
+RUN go mod download || true
+
+# Copy source code
+COPY main.go ./
+
+# Build the binary
+RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o hmmm-monitor main.go
+
+# Final stage - minimal image
+FROM alpine:latest
+
+RUN apk --no-cache add ca-certificates tzdata
+
+WORKDIR /app
+
+# Copy binary from builder
+COPY --from=builder /app/hmmm-monitor .
+
+# Run as non-root user
+RUN addgroup -g 1000 monitor && \
+    adduser -D -u 1000 -G monitor monitor && \
+    chown -R monitor:monitor /app
+
+USER monitor
+
+# Set metadata
+LABEL maintainer="CHORUS Ecosystem" \
+      description="HMMM Traffic Monitor - Real-time libp2p message monitoring for CHORUS"
+
+ENTRYPOINT ["./hmmm-monitor"]