Add Homepage dashboard + dual-export OpenCode traces

Homepage as the front door: single page at framework:7575 with one tile
per service, live widgets where the upstream supports it (Ollama loaded
models, container state via docker.sock, etc.), bookmarks for reference
docs. Config files are pyinfra-managed — source of truth lives in
compose/homepage/, sync by editing there and re-running ./run.sh.

OpenCode plugin now dual-exports spans to Phoenix and OpenLIT in
parallel. Phoenix remains the per-trace waterfall view; OpenLIT picks
up the same data for fleet-level metrics. Each destination has its own
batch processor so a hiccup at one doesn't block the other.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

pyinfra/framework/compose/homepage.yml

@@ -0,0 +1,28 @@
+# Homepage — service launcher + status dashboard for the localgenai stack.
+# https://gethomepage.dev
+#
+# Single tile per service, with live widgets (loaded models, container
+# state, request rates) where the upstream supports it. Reads its config
+# from /srv/docker/homepage/config; pyinfra ships the initial files there
+# and leaves them alone afterwards (edit them directly to add bookmarks,
+# tweak the layout, etc).
+#
+# Bring-up: `docker compose up -d`. UI at http://framework:7575.
+services:
+  homepage:
+    image: ghcr.io/gethomepage/homepage:latest
+    container_name: homepage
+    restart: unless-stopped
+    ports:
+      # 7575 picked to avoid the soup of 30xx ports already in use
+      # (OpenWebUI 3000, OpenLIT 3001, OpenHands 3030).
+      - "7575:3000"
+    volumes:
+      - /srv/docker/homepage/config:/app/config
+      # Read-only docker socket so homepage can render container status
+      # (running / stopped, CPU, memory) on each tile.
+      - /var/run/docker.sock:/var/run/docker.sock:ro
+    environment:
+      # Required when accessed from a host other than localhost (i.e.
+      # over Tailscale by hostname). Comma-separated list; * matches all.
+      HOMEPAGE_ALLOWED_HOSTS: "framework:7575,framework,localhost:7575,localhost,*"