feat(cctv): seven camera packs, semantic labels, terrain-clear monitor planes (#433)

Seven contributed CCTV camera packs (Ontario 511, Fintraffic Finland, DriveBC, TxDOT Texas, Estonia Tallinn + Tarktee, Warendorf, Live Traffic NSW) on a fair per-pack catalog cap; semantic camera labels; monitor planes lifted clear of the terrain from a precomputed, bundled ground-height dataset. Default catalog 800 → 3,446 cameras. Full context in PR #433.

Co-authored-by: sendmebits <[email protected]>
Co-authored-by: avocadoAgent <[email protected]>
Co-authored-by: Alex Harvey <[email protected]>
Co-authored-by: Jason Meredith <[email protected]>
Co-authored-by: Daniel Smith <[email protected]>
Co-authored-by: Vladimir Sobolev <[email protected]>
Co-authored-by: Matthias Schneider <[email protected]>
Co-authored-by: Cyber Knight <[email protected]>
Co-authored-by: NovaSoft Australia <[email protected]>

config/cctv_sources.warendorf.json

@@ -0,0 +1,23 @@
+[
+  {
+    "id": "warendorf-marktplatz-rathaus",
+    "name": "Marktplatz / Historisches Rathaus",
+    "city": "Warendorf",
+    "provider": "Stadt Warendorf",
+    "sourceKind": "municipal-webcam",
+    "feedType": "image",
+    "url": "http://webcam.warendorf.de/image/jpeg.cgi",
+    "snapshotUrl": "http://webcam.warendorf.de/image/jpeg.cgi",
+    "lat": 51.9526613,
+    "lon": 7.9908867,
+    "headingDeg": 221,
+    "headingConfidence": "high",
+    "pitchDeg": -23,
+    "fovDeg": 84,
+    "rangeM": 260,
+    "mountHeightM": 14,
+    "groundElevationM": 55,
+    "poseSource": "curated",
+    "license": "Public municipal webcam data — Stadt Warendorf (courtesy). Mount and heading derived from OpenStreetMap geometry, © OpenStreetMap contributors (ODbL)."
+  }
+]