Simplify redundant SourceGenerationContext qualifier (#3576)

main's lint is still failing: dotnet format --verify-no-changes also flags
the IDE0002 "name can be simplified" hints in ContentDateEnrichmentTests.
SourceGenerationContext is already in scope via the
Elastic.Documentation.Serialization using, so drop the full qualifier.
This was meant to ship with #3575 but missed the squash-merge.

Co-authored-by: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>
Co-authored-by: Cursor <cursoragent@cursor.com>

Author: 3 people

tests-integration/Elastic.ContentDateEnrichment.IntegrationTests/ContentDateEnrichmentTests.cs

@@ -111,7 +111,7 @@ await _transport.PutAsync<StringResponse>(
 
 		var options = new IngestChannelOptions<DocumentationDocument>(_transport, typeContext, indexNameOverride: indexNameOverride)
 		{
-			SerializerContext = Elastic.Documentation.Serialization.SourceGenerationContext.Default
+			SerializerContext = SourceGenerationContext.Default
 		};
 		return new IngestChannel<DocumentationDocument>(options);
 	}
@@ -325,7 +325,7 @@ public async Task ScriptedUpsert_WithFullDocument_ContentLastUpdatedValue()
 			Hash = "testhash123",
 			ContentBodyHash = "contenthash123"
 		};
-		var serializedDoc = JsonSerializer.Serialize(doc, Elastic.Documentation.Serialization.SourceGenerationContext.Default.DocumentationDocument);
+		var serializedDoc = JsonSerializer.Serialize(doc, SourceGenerationContext.Default.DocumentationDocument);
 
 		// Index via scripted upsert (same as HashedBulkUpdate)
 		await IndexFullDocumentViaScriptedUpsert(index, doc.Url, serializedDoc);
@@ -554,7 +554,7 @@ private async Task IndexDocumentsDirectly(string index, params (string url, stri
 				Hash = contentHash,
 				ContentBodyHash = contentHash
 			};
-			var serialized = JsonSerializer.Serialize(doc, Elastic.Documentation.Serialization.SourceGenerationContext.Default.DocumentationDocument);
+			var serialized = JsonSerializer.Serialize(doc, SourceGenerationContext.Default.DocumentationDocument);
 			await IndexFullDocumentViaScriptedUpsert(index, url, serialized);
 		}
 	}