Stop overriding responder no_reply decisions for mention-triggered comments so automation mentions do not loop indefinitely. Update the default prompt to encourage mention handling without forcing replies and add regression coverage for no_reply mention flows.
Add glab-backed GitLab issue polling, login lookup, and comment posting so GitLab projects can be handled alongside GitHub, Gitea, and OpenProject. Also wire GitLab through SCM selection, config defaults, docs, and examples so issue #35 can be configured end to end.