docs(agents): close W3 test support wave

[blakinio]

Purpose

Close OTERYN-W3-TEST-SUPPORT durably after its plan, implementation and both lifecycle archives merged.

Completed W3

Work	Delivery/archive
plan	#71 / #72
deterministic test support	#73 / #74

Current required main: 3431ecbecdd104df35cd569fa353a94fbe8ee67e. All W3 shared-path leases are released.

Delivered routing

• CURRENT_PARALLEL_WAVE.md is a completed/closed W3 record;
• COORDINATOR_AGENT.md authorizes planning only and cannot relaunch W1/W2/W3;
• docs/agents/README.md requires a separate accepted plan before another worker/task/lease;
• unrelated open PRs feat(ui): prototype Oteryn login shell #23/fix(assets): select release archives by client version #37 remain legacy-only and ci: prove official Tibia login without OCR on Synology #48 remains isolated operational work.

Exactly one next recommendation

A bounded blank-window Windows application-shell spike based on merged W2-PR evidence, with main-thread ownership, deterministic shutdown and named Windows runtime validation. This PR creates no task, branch, lease or implementation for it.

Scope

Exactly four coordination documentation paths. No Rust source, Cargo, lockfile, CI, architecture, protocol, assets, legacy runtime or external-repository changes.

Validation

Exact final head: 0fad8cffa0f5e3928dbcd7d7151e12b78b171b4d.

• live W3/archive/open-PR/lease preflight passed;
• complete four-file path/content review passed;
• exact-head required CI pending.