Tighten the provider-label comments and docs

src/layers/awareness/subject.js

@@ -53,8 +53,7 @@ export function createSubject({ state: layerState, services, parts, source }) {
     const vesselsState = sourceStates['ais-live-vessels'];
     const installationsState = sourceStates['military-installations'];
     const evaluatedAt = Date.now();
-    // Whether the provider answered as a fallback or from a stale snapshot.
-    // A poll in flight does not change that, and the source revision ignores it.
+    // A poll in flight keeps FALLBACK or STALE: the revision key ignores loading.
     // Before the first answer there is no snapshot, so loading stays.
     const sourceStatus = (sourceState) => {
       const feedState = layerFeedState(

src/layers/vessels/queries.js

@@ -548,7 +548,7 @@ export function createQueries({
         // backing off, say how long until the next attempt instead of leaving
         // the user to guess whether anything is still happening.
         retryInSec: aisRetryInSec(),
-        // The provider the last snapshot named, as flights and military report it.
+        // Same field as flights and military, so Contacts names the provider.
         source: layer.source,
       };
     },

src/ui/cockpitContext.js

@@ -111,7 +111,6 @@ export function updateContext(info, heading) {
     if (shown) {
       shown.count = cohort.count === null ? '?' : String(cohort.count);
       shown.unknown = cohort.relationship === 'UNKNOWN';
-      // The provider that answered, named as the Layers panel names it.
       shown.source = sourceStatusLabel(cohort.source, cohort.sourceStatus);
     }
     if (cohort.count === null) unknownCount += 1;