Exact declaration Nodes + ContainmentPath transport prerequisite

[briansrls]

Auto-opened by session-dashboard for session loyal-lynx-384.
Pushing to agent/adhoc-66df748f-480-pr-b advances this PR.

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[gunbai-bot]

Closed unmerged as superseded. This branch creates a second v1-local OccurrenceId/AuthoredOccurrence authority in src/v1/00_core.dag. PR B is continuing on #7352 with dag/std/occurrence_identity as the sole semantic authority and a bounded v2 compatibility facade; no implementation from this branch should be cherry-picked.