Terminate app process group on exit

[acroca]

When running an app that spawns other child processes (like go run does) we need to make sure we kill the whole group and not just the parent.

The current implementation leaves the child process orphan, so in some cases like a go run it means the app doesn't really stop when using a dapr stop command. This PR fixes it by killing the whole process tree.

[Copilot]

Pull request overview

Updates dapr run shutdown behavior to terminate the entire application process group (so grandchild processes like those spawned by go run don’t get orphaned), improving reliability of dapr stop/shutdown flows.

Changes:

• Introduces an OS-specific killProcessGroup(*os.Process) helper (Unix: process-group signaling; Windows: delegates to Process.Kill).
• Replaces direct Process.Kill() calls with killProcessGroup() when stopping the app in cmd/run.go.
• Adds Unix implementation that targets the app’s process group to terminate grandchildren.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

File	Description
cmd/run_unix.go	Adds Unix killProcessGroup implementation using Getpgid and group signaling.
cmd/run_windows.go	Adds Windows killProcessGroup stub delegating to Process.Kill.
cmd/run.go	Switches app termination logic to use killProcessGroup in two shutdown paths.

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[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

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[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

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[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

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[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 15.43%. Comparing base (fd34ce5) to head (4ef451e).
⚠️ Report is 24 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1602      +/-   ##
==========================================
- Coverage   15.45%   15.43%   -0.03%     
==========================================
  Files          64       64              
  Lines        7220     7230      +10     
==========================================
  Hits         1116     1116              
- Misses       6018     6028      +10     
  Partials       86       86              

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[Copilot]

Pull request overview

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

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Pull request overview

Copilot reviewed 4 out of 4 changed files in this pull request and generated no new comments.

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[JoshVanL]

Not an interesting network failure, looks good