Merge remote-tracking branch 'upstream/main' into fix-1237

# Conflicts:
#	README.md
#	docs/CURRENT-STATE.md

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).