fix(beads): keep bootstrap on agentv-beads

[christso]

Summary

Stacked fix for PR #1460 after review/dogfood found two Beads identity regressions.

This keeps PR #1460 from mutating the user-owned branch directly while making the correction reviewable.

What changed

• Adds sync.remote to .beads/config.yaml so bd bootstrap chooses EntityProcess/agentv-beads instead of the code repo when EntityProcess/agentv still advertises refs/dolt/data.
• Restores the stable .beads/metadata.json identity descriptor from origin/main, because bd currently gets dolt_database: av and project_id from metadata and does not honor those keys from config.yaml.
• Cancels the contradictory docs/ignore changes from PR fix(beads): harden worktree identity checks #1460, leaving the net diff against origin/main as only the sync.remote line.

Verification

• Fresh temp clone with staged fix: bd bootstrap --dry-run --json planned action: sync, database: av, sync_remote: git+https://github.com/EntityProcess/agentv-beads.git.
• Fresh temp clone actual bootstrap: bd bootstrap --yes synced from agentv-beads; bd --readonly count returned 222; bd --readonly list --limit 5 --no-pager returned real av-* issues.
• Existing embedded-Dolt fixture with restored metadata: bd context --json resolved database av; bd --readonly count returned 222; list returned av-* issues without running bootstrap.
• Red check with same embedded store and missing metadata reproduced the failure: default database beads, count 0, no issues.
• git diff --check and git diff --check origin/main...HEAD passed.

Notes

Review finding: federation.remote is not enough for bootstrap; bd bootstrap keys off sync.remote. Also, until upstream bd can express database identity in tracked config, .beads/metadata.json is not disposable for this repo.

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[christso]

Closing this stacked draft as obsolete. PR #1460 changed shape after review and now keeps live Beads config local / moves developer guidance to the shared Beads skill, so this branch conflicts with the current intended approach. The remaining active PR is #1460.