feat: add http, snmp, docker plugins; new widgets and routes for traefik/unifi/ups

- Add HTTP monitor plugin: endpoint checking with status history, latency tracking, time-range views
- Add SNMP plugin: OID polling, device management, metric recording
- Add Docker plugin: container status, resource usage, widget
- Traefik: access log widget, request chart widget, expanded routes
- UniFi: clients widget, devices widget, expanded poll routes
- UPS: history widget, additional routes
- Update plugin index with new entries

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

snmp/plugin.yaml

@@ -0,0 +1,30 @@
+# plugins/snmp/plugin.yaml
+name: snmp
+version: "1.0.0"
+description: "SNMP polling for network devices — switches, routers, printers, UPSes, etc."
+author: "FabledScryer"
+license: "MIT"
+min_app_version: "0.1.0"
+repository_url: "https://git.fabledsword.com/bvandeusen/FabledScryer-plugins"
+homepage: "https://git.fabledsword.com/bvandeusen/FabledScryer-plugins/src/branch/main/snmp"
+tags:
+  - snmp
+  - network
+  - monitoring
+
+config:
+  poll_interval_seconds: 60
+  # Each device is polled independently. OIDs must resolve to numeric values.
+  devices:
+    - name: "core-switch"
+      host: "192.168.1.1"
+      port: 161
+      community: "public"
+      version: "2c"    # "1", "2c", or "3"
+      oids:
+        - oid: "1.3.6.1.2.1.1.3.0"
+          label: "uptime_centisecs"
+        - oid: "1.3.6.1.2.1.2.2.1.10.1"
+          label: "if1_in_octets"
+        - oid: "1.3.6.1.2.1.2.2.1.16.1"
+          label: "if1_out_octets"