docs(street-level): shorten docs and comments before merge

Trim the doc text this PR adds (README, CHANGELOG, CURRENT-STATE,
KNOWN-ISSUES, SECURITY, DATA_SOURCES, .env.example, the CI job comment),
drop code comments that restate the code, cut design-note JSDoc to a line
or two, and drop review tags from test names. Comments only; no code
changes.

Also: README key count (seven keys, two metered), CURRENT-STATE's gate
paragraph (CI runs a production build with a dummy token), the stacked
doc above meshBoxInRange and the orphaned inMeshRange line in
coverage.js, and a duplicate ALPR row in DATA_SOURCES that a merge had
brought back.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

docs/KNOWN-ISSUES.md

@@ -58,9 +58,8 @@ Related keys (current versions):
   `'1'` closed, absent means the panel's own default. A view opened from a share
   link ignores the stored value entirely.
 - Panel positions: `godsEyeView.v8.panelPos.<panel-id>` — written only for a
-  portable panel (CCTV, Street Level) lifted out of its rail, as
-  `{ left, top, width, height, floating: true }`. Deleting it, or double-clicking
-  the panel header, returns that panel to the rail; docked panels store nothing.
+  floating portable panel (CCTV, Street Level). Deleting it, or double-clicking
+  the panel header, docks the panel again.
 - CCTV calibration: `godsEyeView.cctv.calibration.v2`
 
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