PR #15750 claim-origin — 24h post-deploy verification

Read-only 24h follow-up on device-detected-ingestor v130 (deployed 2026-09-25 09:02 UTC). Datadog + Neon identity/connect. Confirmed: 0 errors/throttles, duration down, all 3 origin branches live, fallback=0. 2 new CONNECT_FLOW Device claims (Tesla) landed; safety check LinkSession.customerId==thirdPartyId PASS on both. No BULK_IMPORT identity rows yet (self-heal classifies origin without INSERT, per prior finding).