[trissim]

Remove the three relocation modules introduced by #2635 and put their behavior on the existing Thread, registry-privacy and Pi event owners. Deletes 296 lines and adds 198 (net -98).

• ThreadRename, PlainRename and PrivateOwnerRename are deleted, including their privacy-to-handler map and registration hook. RegistryPrivacy.rename dispatches on the existing public/private owners; ThreadManagement applies the shared title, activity, runtime, ledger and catalog updates. The private owner retains the SQL/registry intent, compensation and completion behavior. RenameThreadResult lives beside its producing operation.
• ThreadProvenance lives with Thread as its existing parent. Session-file, title, tags and backend registration metadata/defaults are inherited once; the repeated child declarations are deleted. Archived provenance still has no execution state. All Core consumers and test imports target the owner directly.
• PiEvent owns both declaration registration and phase transition behavior. The forwarding-only PiTurnPhase parent is deleted. Existing MRO start precedence, end-event union and specialized compaction/tool hooks are retained. The two remaining derived phase maps are still tracked as unfinished roster work; moving them does not mark that phase complete.
• Plan evidence and its counterexample fixtures follow the actual owners (RegistryPrivacy, PiEvent). No aliases or re-exports remain for the deleted modules.

Validation is assigned to the single integrator under Tristan's current order: no worker tests, debt scans or census runs. The attempted broad inventory was stopped without a completed current-head census; no global AST completeness or runtime equivalence claim is made. The migration used exact AST declaration spans for source edits and the source/import trace retained from the existing ownership work.

Integrator touched checks: tests/test_operations.py, tests/test_acp_private_nk_delivery.py, tests/test_importing.py, tests/test_historical_views.py, tests/test_pi_rpc_nominal.py, tests/test_phase_evidence.py, and tests/guards/test_source_proof_ownership.py. Integrate this head into the single integration branch; do not launch a separate worker suite.

Assumed: the integrator owns import/runtime and behavioral qualification at the combined head. No install or live verification is claimed.

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