feat(mcp): let agents change thread workspaces

apps/server/src/git/GitWorkflowService.ts

@@ -85,6 +85,10 @@ export class GitWorkflowService extends Context.Service<
       { readonly commitSha: string; readonly remoteRefName: string },
       GitCommandError
     >;
+    readonly resolveCommit: (input: {
+      readonly cwd: string;
+      readonly revision: string;
+    }) => Effect.Effect<{ readonly commitSha: string }, GitCommandError>;
     readonly removeWorktree: (
       input: VcsRemoveWorktreeInput,
     ) => Effect.Effect<void, GitCommandError>;
@@ -333,6 +337,10 @@ export const make = Effect.gen(function* () {
       ensureGitCommand("GitWorkflowService.resolveRemoteTrackingCommit", input.cwd).pipe(
         Effect.andThen(git.resolveRemoteTrackingCommit(input)),
       ),
+    resolveCommit: (input) =>
+      ensureGitCommand("GitWorkflowService.resolveCommit", input.cwd).pipe(
+        Effect.andThen(git.resolveCommit(input)),
+      ),
     removeWorktree: (input) =>
       ensureGitCommand("GitWorkflowService.removeWorktree", input.cwd).pipe(
         Effect.andThen(git.removeWorktree(input)),