* feat: open Linear-triggered PRs as the triggering user
Add 'linear' to the set of sources that carry a mapped GitHub login
(Slack, Linear, dashboard, schedule), so Linear-triggered runs resolve
the per-user OAuth token when the author_prs_as_user profile flag is
enabled. Previously only Slack and dashboard runs could open PRs as the
user; Linear runs always used the bot token.
The Linear webhook now resolves the GitHub login from the Linear email
via the same user-mapping store Slack uses, and passes it through the
run configurable and thread owner metadata.
Refs: 5003c953 (upstream #1683)
* fix(open-swe): restrict Linear token attribution to comment author only
Split actor_email (comment_author only, feeds github_login for token
attribution) from user_email (full fallback chain, for display/model).
This ensures a PR is never opened as a non-actor (creator/assignee).
Add test_resolve_github_token_linear_defaults_to_bot to lock the
security-critical default: Linear + mapped login + no opt-in → bot.
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Co-authored-by: amoussa1229 <166072409+amoussa1229@users.noreply.github.com>
Co-authored-by: Adam Moussa <adam@seahavenind.com>
