external-events: migrate dossier to split register/ingest ABI

[jasny]

Summary

• Migrated ownables/dossier off legacy external-event ABI to split runtime ABI exports:
  • replaced ownable_external_event with ownable_register, ownable_ingest, and ownable_encode_public_event
  • replaced legacy external-event request handling with split register/ingest handlers
• Updated dossier contract interfaces from register_external_event(ExternalEventMsg, ...) to:
  • register(RegisterPublicEventMsg)
  • ingest(IngestEventMsg)
• Kept existing lock validation logic and adapted it to decode lock attributes from register event payload bytes.
• Updated schema exports to include:
  • register_public_event_msg.json
  • ingest_event_msg.json
  • encode_public_event_msg.json
• Added focused dossier ABI migration unit coverage for:
  • positive register lock payload replay through register_handler, including instantiate/lock setup and unlocked state verification
  • invalid register payload handling
  • encode_public_event payload encoding
  • intentional ingest NotImplemented behavior

Canonical Plan

• /home/arnold/Projects/eqty/.runs/2026-05-23_18-38-53_external-events/plans/ownables-js.md

Verification

• cargo test -q in ownables/dossier passed, 6 tests
• cargo run --example schema in ownables/dossier passed
• yarn lint passed
• yarn typecheck passed
• yarn test passed, 34 files / 285 tests

PR Scope

• Base: feat/public-events
• Diff is scoped to ownables/dossier; wallet/mobile files are excluded from the review surface.

Temporary Dependencies

• None

Upstream Version Replacement Dependency

• None

Remaining Risks / Follow-up

• dossier currently returns NotImplemented for ingest; this is intentional for current contract behavior and now has explicit coverage.

[jasny]

Follow-up cleanup applied for replay context naming consistency in external-events flow.

Changes in this PR branch:

• register_public_event_msg.json -> register_msg.json
• ingest_event_msg.json -> ingest_msg.json

Scope was limited to direct string references in packages/core/src/services/Ownable.service.ts and packages/core/tests/ownable.service.test.ts.

Verification run:

• yarn test packages/core/tests/ownable.service.test.ts (pass)
• yarn lint (pass)
• yarn typecheck (pass)