fix: interpolate vars in defer

[vmaerten]

fixes #1909

[Copilot]

Pull Request Overview

This PR fixes issue #1909 by ensuring that variable interpolation works correctly for deferred tasks. The changes include updating the Taskfile.yml to use interpolation in both deferred and immediate tasks, adding test assertions in task_test.go for the new behavior, and updating task.go to handle variable replacements in the deferred command fields.

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
testdata/deferred/Taskfile.yml	Added deferred and immediate task definitions with interpolated variables
task_test.go	Added test assertions to verify deferred task variable interpolation
task.go	Updated deferred command processing to include task and vars interpolation

Comments suppressed due to low confidence (2)

task.go:300

• Consider adding unit tests that validate the interpolation behavior for both cmd.Task and cmd.Vars to ensure deferred commands are processed as expected.

cmd.Task = templater.ReplaceWithExtra(cmd.Task, cache, extra)

task_test.go:1814

• Consider adding a test case for the immediate command interpolation outcome (for example, verifying 'task immediate' outputs) to ensure consistency between deferred and immediate tasks.

assert.Contains(t, buff.String(), "child task deferred value-from-parent")