docs(track-a): promote QTcpSocket-bound binary boundary

[blakinio]

Coordinator promotion/closeout for researcher Draft #490 / OTC-20260817-track-a-p2-4dd250-qiodevice-provenance.

Decision: ACCEPT_WITH_EDITS.
Trusted integration base: main@c1ddb0e0a8a6a1634668f025837aab72d20af64e.
Source final head: 6d6211b89c802600ab7e749d3b08ba3f7a60840f.
Exact client: 15.32.df7b29, size 51965216, SHA-256 e6c244bd39fe2e0632f6f000efd3147164696efa8e901718668e0442325ff7fe.

Promoted bounded result:

• current writer TIODeviceWriter, AP 0x2f69d48: FACT;
• current QIODevice is concrete QTcpSocket, owned by TGameserverTCPConnection: FACT;
• exact target 0x4dd250 = QDataStream::writeRawData(char const*, qint64): FACT;
• canonical payload pointer/length reaches that call on a QDataStream constructed on TGameserverTCPConnection::QTcpSocket*: FACT;
• Qt QTcpSocket-bound binary boundary: PROVEN;
• FINAL_BINARY_EGRESS=PROVEN_AT_QT_QTCPSOCKET_BOUNDARY;
• FINAL_SOCKET_OWNER=FACT:TGameserverTCPConnection;
• FINAL_OS_SOCKET_SYSCALL=UNKNOWN;
• framing, sequence, compression, encryption remain UNKNOWN.

Source exact-head validation: Track A governance 32039404811 = SUCCESS; CI 32039405213 = SUCCESS; CI / Required 95416178014 = SUCCESS; source diff exactly 3 durable P2 files; one-shot workflow absent; coordinator review 4952339069, audit PASS_BOUNDED, material findings 0.

This closeout intentionally creates no next active research task because the current autonomous invocation has already consumed its one permitted additional task. Future independent frontiers are recorded only as archive/promotion prose.

E2E: NOT_APPLICABLE — static exact-file/disassembly evidence only.

Merge only after exact-head promotion governance/CI, fresh diff audit, review hygiene, and current-main freshness pass.

[blakinio]

Final coordinator integration audit: PASS_BOUNDED; material findings open 0.

Reviewed the full exact-head three-file diff against source #490 head 6d6211b89c802600ab7e749d3b08ba3f7a60840f, accepted #308 writer/QDataStream evidence, merged #299 TCPConnection/QTcpSocket evidence, and the exact generation logs cited by the promotion. No source researcher summary is treated as proof.

The promotion uses the correct abstraction boundary: canonical gameplay binary payload is proven through QDataStream::writeRawData on a QDataStream constructed on the concrete TGameserverTCPConnection::QTcpSocket*; FINAL_SOCKET_OWNER=TGameserverTCPConnection is supported. It explicitly keeps FINAL_OS_SOCKET_SYSCALL, framing, sequence, compression and encryption UNKNOWN and does not infer a kernel-level send/write.

Lifecycle is bounded and correct: the source task is archived with ownership released, and no new active research task is created because this invocation has consumed its additional-task allowance.

Promotion validation: CI run 32039678486 = SUCCESS, CI / Required job 95416679707 = SUCCESS; archive-only diff does not trigger Track A runtime-governance. Reviews/threads before this audit 0/0; current main remains exact integration base c1ddb0e0a8a6a1634668f025837aab72d20af64e.

E2E: NOT_APPLICABLE — static exact-file/disassembly evidence promotion only.