chore(OMN-14758): allowlist kafka_transport.py freestanding Kafka client

[jonahgabriel]

OMN-14758 — allowlist the S6 KafkaTransport freestanding Kafka client

omnibase_infra PR #2341 (S6 composition wiring) imports KafkaTransport into the live service_kernel boot path, flipping src/omnibase_infra/event_bus/kafka_transport.py from dead to live. The imperative-contract guard then blocks on its raw AIOKafkaProducer/AIOKafkaConsumer clients (L160/L182).

KafkaTransport is the pull-based transport implementation RuntimeDispatch consumes (poll/commit/nack) and legitimately owns the raw aiokafka clients — architecturally identical to the already-allowlisted sibling event_bus_kafka.py. This adds the matching freestanding_kafka_client allowlist entry so the guard stays green once #2341 wires the transport live.

Verified locally: check-imperative-contracts --repo-root <infra> --allowlists-dir allowlists --scan-freestanding -> live 0, exit 0.

Self-binding OCC evidence: adds dod_evidence occ-self-bind-pr-4395 to contracts/OMN-14758.yaml plus its PASS receipt.

Closes-partial OMN-14758.

Evidence-Source: OCC#4395
Evidence-Ticket: OMN-14758

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Configuration used: defaults

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📥 Commits

Reviewing files that changed from the base of the PR and between 17c55d9 and 3d50247.

📒 Files selected for processing (3)

• allowlists/omnibase_infra.yaml
• contracts/OMN-14758.yaml
• drift/dod_receipts/OMN-14758/occ-self-bind-pr-4395/command.yaml

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch jonah/omn-14758-allowlist-kafka-transport

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[jonahgabriel]

Superseded by merged OMN-14758 allowlist/evidence repairs: dev OCC#4393 and main hotfix #4394. Closing this conflicting duplicate to keep the merge queue clean.