diag(track-a): inventory contained Xvfb GLX capability

[blakinio]

Track A RUNTIME-INFRA — contained Xvfb GLX capability inventory

Task: OTC-20260816-track-a-xvfb-glx-capability.
Base: exact trusted main@d3f186414256151c9d5e03f34c5a9026b1fba500.
Execution: one read-only physical support-filesystem inventory on synology-otclient-01; no X server and no official client are started.

Input: Draft #415 directly observed that the accepted contained Xvfb display does not advertise GLX while Qt successfully discovers and loads libqxcb-glx-integration.so. This task does not promote #415; it uses that result only to select the next bounded support-only question.

The inventory is fixed to /work/_otclient_tibia_re_state/toolroot/usr/bin/Xvfb and the contained xorg module tree. It records Xvfb SHA/ELF dependencies, bounded GLX symbol/string matches and fixed GLX/glamor module candidates plus their dependency metadata.

No /proc inventory, canonical lease/registration/session state, X11/VNC state, client package/process, credentials, network/game/login, Track B or historical #303 surface is observed. runtime_access: read_only, mutation_authorized:false.

Research output remains Draft-only; coordinator promotion is separate.

[blakinio]

Coordinator disposition: CLOSED_SUPERSEDED / historical support inventory retained. This Draft established useful contained-Xvfb/GLX component inventory, but the downstream causal chain completed through #421 and was independently promoted to canonical evidence by #427. Its unique inventory remains available in this closed PR as discovery evidence; no need to merge its stale task state or create a parallel canonical claim.