docs: bring the README, data sources and known issues up to date (#712)

Reflect the weather stack, analyst records and feed provenance, satellite pass predictions and live camera video that landed since the last full pass.

Co-authored-by: Matt Van Horn <[email protected]>

src/tooling/transitQa.test.mjs

@@ -675,7 +675,7 @@ test('public transit documentation uses courtesy attribution and the approved gr
   );
   assert.ok(
     readme.includes(
-      'Fifteen layers and map sources. **Thirteen have a keyless path.**',
+      'Nineteen layers and map sources. **Seventeen have a keyless path.**',
     ),
   );
   assert.ok(