Carry RuntimeEntityKey through spatial residency, visibility transitions, rebucketing, quiescence, landblock retirement, and origin recentering. This prevents stale incarnation edges from mutating a replacement projection while retaining the static DAT-entity path.
Validated by 104 focused ownership/streaming tests, the Release solution build, and 8,444 complete Release tests with five existing skips.
Co-authored-by: Codex <codex@openai.com>
Introduce the presentation-free RuntimeEntityDirectory and RuntimeEntityRecord as the sole owners of server GUIDs, INSTANCE_TS incarnations, accepted snapshots, authority versions, retryable tombstones, session epochs, and local-ID allocation. Convert LiveEntityRuntime into an App projection sidecar host resolved through canonical record identity without a second GUID map.
Preserve the existing synchronous and reentrant projection lifecycle, including retryable registration/delete/session teardown. Add Runtime-only identity/lifetime tests and App ownership guards.
Validated by the Release solution build and 8,441 complete Release tests with five existing skips.
Co-authored-by: Codex <codex@openai.com>