feat: unified fleet telemetry — canonical format, GPS/IP geo, WAN health dashboard

- Rewrite telemetry-synology.sh: canonical GL format (modem_0001/wan keys),
  self-contained metrics (no aiwanbal), Eyeride GPS with IP geo fallback
- Add /api/fleet-telemetry to hub: joins tunnel status with fleet Postgres
- Update dashboard.html: per-device WAN health bars, GPS, signal strength
- Fix hub/ingest.sh normalisation: remap old wan1/wan2 → modem_0001/wan
- Bump SPK version: 0.1-0001 → 0.5.0-0001 for GL parity

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

hub/ingest.sh

@@ -18,23 +18,31 @@ mkdir -p "$TELEM_DIR" "$BACKUP_DIR"
 
 # ── Normalise telemetry ────────────────────────────────────────────
 # Both platforms POST to /api/telemetry.
-# GL uses: modem_0001/wan keys, no "platform" field
-# Synology uses: wan1/wan2 keys, "platform":"synology"
-# Output: unified schema with platform field + wan1/wan2 keys
+# Canonical format uses modem_0001/wan keys (matching GL standard).
+# Handles three variants:
+#   - GL (no platform field): add platform="openwrt", pass through
+#   - GL (platform="openwrt"): already canonical, pass through
+#   - Old Synology (platform="synology" + wan1/wan2): remap to modem_0001/wan
+#   - New unified Synology (platform="synology" + modem_0001/wan): pass through
 normalise_telemetry() {
-    local json="$1"
-    local platform=""
+    json="$1"
+    platform=""
 
     platform=$(echo "$json" | grep -o '"platform":"[^"]*"' | cut -d'"' -f4)
     if [ -z "$platform" ]; then
-        # Pre-unified GL telemetry — add platform, remap keys
+        # Pre-unified GL telemetry — add platform field, keys already canonical
         platform="openwrt"
         json=$(echo "$json" | sed \
-            -e 's/"modem_0001"/"wan1"/g' \
-            -e 's/"platform":"openwrt"/"platform":"'"$platform"'"/')
+            -e 's/^{/{"platform":"'"$platform"'",/')
+    fi
+
+    # Remap old Synology wan1/wan2 keys to canonical modem_0001/wan
+    if echo "$json" | grep -q '"wan1"'; then
+        json=$(echo "$json" | sed \
+            -e 's/"wan1"/"modem_0001"/g' \
+            -e 's/"wan2"/"wan"/g')
     fi
 
-    # Ensure both wan1 and wan2 keys exist (Synology uses wan1/wan2 natively)
     echo "$json"
 }