fix(street-level): SINCE note on the value's line: ANY DATE (by upload date)

The slim-down in #974 dropped --sl-text-small, which .sl-since-note still
used, so with KartaView lit "KartaView: by upload date" rendered on its
own line larger than the value. The note now sits beside the value in the
same mono type and letter spacing, a size smaller (0.5rem), as
"(by upload date)". One source is lit at a time, so the provider name is
dropped. es/ru catalogs, tests, README, CURRENT-STATE and the registry
JSDoc follow.

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

changelog.d/1286-since-note-inline.md

@@ -0,0 +1,4 @@
+- The Street Level SINCE note sits on the value's line, in its type and a
+  size smaller: with KartaView lit it reads ANY DATE (by upload date). It
+  had lost its size variable in the Street Level slim-down and rendered
+  larger than the value, on a line of its own (asturksever, #1286).