fix(import): stamp importer git identity on checkpoint commits

[peyton-alt]

Summary

entire import writes checkpoint commits with an empty git author signature — writeTurn never set AuthorName/AuthorEmail and CreateCommit applies them verbatim. That breaks importer attribution on the data plane's GitHub→mirror ingestion path: mirror-sync pushes carry no pusher identity, so entire-api falls back to the checkpoint commit's git author — which is empty for imports, leaving them permanently unattributable there.

This resolves the importer's identity once per import run via the checkpoint package's GetGitAuthorFromRepo (the same fallback every other checkpoint write path uses) and stamps it on each import commit. The data plane's existing author machinery then attributes imports with no special casing — and it de-identifies (the email is HMAC'd, never stored).

Companion to entirehq/entire-api#405 (data-plane import ingestion) and entirehq/entire.io#3310 (BFF import ingestion); follows up #1825.

Test plan

• New: imported checkpoint commit carries the repo's configured git author (real import run, real repo, assertion on the actual commit signature)
• New: unconfigured git identity falls back to Unknown/unknown@local (HOME/XDG isolated)
• mise run test — 8303 tests green; mise run test:integration green; mise run lint 0 issues

🤖 Generated with Claude Code

https://claude.ai/code/session_01QUDkzmpwgC4BiZ894UfnTy

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Note

Low Risk
Localized change to the import write path using an existing attribution helper; behavior matches other checkpoint commits, with new tests covering configured and default authors.

Overview
entire import previously wrote checkpoint commits with an empty git author because writeTurn never set AuthorName / AuthorEmail. On GitHub→mirror ingestion, when there is no pusher identity, the data plane falls back to the checkpoint commit author—so imported sessions stayed unattributed.

The import run now resolves the importer’s identity once via checkpoint.GetGitAuthorFromRepo (same helper as other checkpoint writes) and passes it into each imported checkpoint write so commits carry a real signature, or Unknown / unknown@local when git user config is missing.

Tests assert the commit author matches repo-local git config and the unconfigured fallback.

^{Reviewed by Cursor Bugbot for commit 4df67dc. Configure here.}

[Copilot]

Pull request overview

Fixes entire import attribution by ensuring imported checkpoint commits are created with a non-empty git author signature, using the same repo-based identity resolution (checkpoint.GetGitAuthorFromRepo) as other checkpoint write paths. This restores downstream attribution behavior on the GitHub→mirror ingestion path, where commit author is used as a fallback identity.

Changes:

• Resolve git author name/email once per import run and stamp it onto each imported checkpoint commit.
• Extend agent-import E2E-ish tests to assert checkpoint commit author behavior for both configured and unconfigured git identities.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
cmd/entire/cli/agentimport/agentimport.go	Resolve importer git identity once and pass it through to checkpoint writes via AuthorName / AuthorEmail.
cmd/entire/cli/agentimport/agentimport_test.go	Add tests asserting imported checkpoint commit author uses repo identity and falls back to Unknown/unknown@local when unconfigured.