Merge branch 'main' into fix/cctv-tool-routing

changelog.d/1228-cctv-ontario-511-key.md

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+- Load Ontario 511 cameras again. 511on.ca's camera endpoint now requires a
+  free developer key; set `ONTARIO_511_API_KEY` to enable the pack, which is
+  otherwise skipped with one log line saying where to get a key
+  (quanticsoul4772, #1228).

changelog.d/1237-taiwan-freeway-cctv.md

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+- Add Taiwan's national freeway cameras from the Freeway Bureau, MOTC to CCTV:
+  ~1,800 cameras read at runtime from the official MOTC 2.0 open-data table,
+  with on-demand snapshots and attribution. No API key is required; set
+  `CCTV_TAIWAN_ENABLED=0` to skip it (419vive, #1237).

changelog.d/1283-satellite-cache-provenance.md

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+- Report cached CelesTrak satellite records as stale in the Data Layers row,
+  preserving separate core and dense catalog provenance through refresh,
+  removal and lifecycle cleanup (rudycelekli, #1283).

changelog.d/1284-route-plausibility-segment.md

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+- Keep aircraft route labels on the scheduled airport leg instead of accepting
+  its distant great-circle extensions, preserving generous endpoint tolerance
+  across the signed-angle branch cut (rudycelekli, #1284).

changelog.d/974-street-level-slim.md

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+- Street Level is rebuilt around one small provider registry: Mapillary,
+  KartaView, Panoramax and Google Street View share one coverage drawer and
+  one photo viewer, one source lit at a time. Floating and docked panels,
+  FOLLOW, surface modes, the legend and the Mapillary proxy's disk cache are
+  gone; `.gev-cache/mapillary/` from earlier runs is no longer read and can be
+  deleted (gekh, #974).

changelog.d/990-hong-kong-cctv.md

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+- Add Hong Kong Transport Department traffic snapshot cameras as a keyless CCTV
+  source pack: the public DATA.GOV.HK English locations XML, frames pinned to
+  `tdcctv.data.one.gov.hk`, with DATA.GOV.HK Terms of Use attribution. By
+  default nearly the full TD catalog (~1,013 cameras; cap 1,100) loads,
+  prioritized across Hong Kong Island, Kowloon and the New Territories. Headings
+  use the shared id-hash fallback at low confidence. `CCTV_HK_MAX_SOURCES` sets
+  the cap (8–1,200) and `CCTV_HK_ENABLED=0` turns the pack off (JCY2515, #990).