docs(484): correct the counted-enumeration counts on the api client interfaces

Review follow-up. The comments still said three (Jellyfin) / two (Emby)
library-level enumerations after the nested season and episode ones were
counted, which understates the reach of the very safety property this
branch establishes -- a future auditor reading them would conclude the
nested sweeps are unprotected.

ErsatzTV.Core/Interfaces/Emby/IEmbyApiClient.cs

@@ -9,9 +9,12 @@ public interface IEmbyApiClient
     Task<Either<BaseError, EmbyServerInformation>> GetServerInformation(string address, string apiKey);
     Task<Either<BaseError, List<EmbyLibrary>>> GetLibraries(string address, string apiKey);
 
-    // #484: the two library-level enumerations that feed a reconciliation sweep accept an optional
-    // per-enumeration counter. The caller creates one instance per enumeration and reads it only after
-    // the enumeration completes; passing null (the default) opts out and costs existing callers nothing.
+    // #484: the four enumerations that feed a reconciliation sweep accept an optional per-enumeration
+    // counter -- the two library-level ones (movies, shows) AND the two nested ones (seasons per show,
+    // episodes per season), which feed the per-parent sweeps in MediaServerTelevisionLibraryScanner.
+    // The caller creates one instance per enumeration, scoped to the parent it sweeps, and reads it
+    // only after that enumeration completes; passing null (the default) opts out and costs existing
+    // callers nothing.
     IAsyncEnumerable<Tuple<EmbyMovie, int>> GetMovieLibraryItems(
         string address,
         string apiKey,

ErsatzTV.Core/Interfaces/Jellyfin/IJellyfinApiClient.cs

@@ -9,9 +9,12 @@ public interface IJellyfinApiClient
     Task<Either<BaseError, JellyfinServerInformation>> GetServerInformation(string address, string authorizationHeader);
     Task<Either<BaseError, List<JellyfinLibrary>>> GetLibraries(string address, string authorizationHeader);
 
-    // #484: the three library-level enumerations that feed a reconciliation sweep accept an optional
-    // per-enumeration counter. The caller creates one instance per enumeration and reads it only after
-    // the enumeration completes; passing null (the default) opts out and costs existing callers nothing.
+    // #484: the six enumerations that feed a reconciliation sweep accept an optional per-enumeration
+    // counter -- the three library-level ones (movies, music videos, shows) AND the three nested ones
+    // (seasons per show, episodes per season, both episode variants), which feed the per-parent sweeps
+    // in MediaServerTelevisionLibraryScanner. The caller creates one instance per enumeration, scoped
+    // to the parent it sweeps, and reads it only after that enumeration completes; passing null (the
+    // default) opts out and costs existing callers nothing.
     IAsyncEnumerable<Tuple<JellyfinMovie, int>> GetMovieLibraryItems(
         string address,
         string authorizationHeader,