feat(FN-3868): add changeset for github tracking settings

Adds a changeset for the GitHub tracking settings feature (FN-3868), preparing it for the next release. The feature itself was implemented in earlier steps; this changeset marks it for publication to npm.

Fusion-Task-Id: FN-3868

packages/core/src/settings-schema.ts

@@ -52,6 +52,7 @@ export const DEFAULT_GLOBAL_SETTINGS = {
   updateCheckFrequency: "daily",
   autoReloadOnVersionChange: true,
   showGitHubStarButton: true,
+  githubTrackingDefaultRepo: undefined,
   modelOnboardingComplete: undefined,
   useClaudeCli: undefined,
   useDroidCli: undefined,
@@ -229,6 +230,10 @@ export const DEFAULT_PROJECT_SETTINGS = {
   autoUpdatePrStatus: false,
   githubCommentOnDone: false,
   githubCommentTemplate: undefined,
+  githubTrackingEnabledByDefault: false,
+  githubTrackingDefaultRepo: undefined,
+  githubAuthMode: "gh-cli",
+  githubAuthToken: undefined,
   autoBackupEnabled: false,
   autoBackupSchedule: "0 2 * * *",
   autoBackupRetention: 7,