feat(usgs-eq): Phase 3 — USGS Earthquake Feed publisher

Pattern C feed adapter: single system, single datastream, many events per cycle.
- bootstrap_usgs_eq.py: procedure + system + datastream + 2 deployments
- usgs_eq_publisher.py: polls all_day.geojson every 60s, dedupes by (id, updated)
- Dockerfile + docker-compose updated (10 services total)
- Bootstrap run: proc=046g sys=059g ds=05ag deploy_root=054g deploy_feed=0550
- First cycle: 294 earthquakes published, 0 errors
- VM deployed as systemd service (12 services running total)

Author: Sam-Bolling

publishers/docker-compose.yml

@@ -114,5 +114,15 @@ services:
       # USGS_API_KEY: "${USGS_API_KEY:-}"
     command: ["--interval", "900"]
 
+  # ── USGS Earthquake Feed (60s cadence) ──
+  usgs-eq:
+    build:
+      context: ..
+      dockerfile: publishers/usgs_eq/Dockerfile
+    restart: always
+    environment:
+      <<: *osh-env
+    command: ["--interval", "60"]
+
 volumes:
   buoycam-cache:

publishers/usgs_eq/Dockerfile

@@ -0,0 +1,18 @@
+FROM python:3.12-slim
+
+LABEL maintainer="OS4CSAPI" \
+      description="USGS Earthquake Feed publisher — polls all_day GeoJSON every 60s"
+
+WORKDIR /app
+COPY bootstrap_helpers.py publishers/bootstrap_helpers.py
+COPY publishers/__init__.py publishers/__init__.py
+COPY publishers/usgs_eq/ publishers/usgs_eq/
+
+# No pip install needed — stdlib only
+
+ENV OSH_ADDRESS=os4csapi-osh.duckdns.org \
+    OSH_PORT=443 \
+    OSH_USER=os4csapi \
+    OSH_PASS=ogc134mm
+
+CMD ["python", "-u", "-m", "publishers.usgs_eq.usgs_eq_publisher", "--interval", "60"]

publishers/usgs_eq/__init__.py

@@ -0,0 +1 @@
+# USGS Earthquake Feed publisher package