docs: refresh for recent changes (2026-09-21 - 2026-09-28)

[inth3shadows]

What changed

#92 (test(record): J5 end to end, nothing mocked, declared covers("J5")) gave J5 a declared journey-level test, but four places still described J5 as undeclared/missing:

• CHANGELOG.md [Unreleased] — "full-registry selection reports NO JOURNEY-LEVEL TEST: J1, J5, J6, J7"
• TECHNICAL.md — "testgraph declares J2, J3, J4 and J8" / same NO JOURNEY-LEVEL TEST line
• TECHNICAL.md Known Limitations — "Four of testgraph's eight journeys (J1, J5, J6, J7) have no covers() test"

All four updated: J5 moves from the missing list to the declared list (now J1, J6, J7 missing — three, not four), each with a pointer to #92. Verified against grep -rn "@covers(" tests/, which lists J2, J3, J4, J5, J8 as declared today.

Docvet

.mcp.json false positives in README.md/USAGE.md are pre-existing (the tool's own evidence field already says [points to VALID] — it's an intentionally untracked runtime file, per this repo's .docvetignore header). Left alone; no broken anchors before or after (this repo has none yet).

Out of scope / not touched

• README.md and USAGE.md were current — no stale claims found beyond the J5 count.
• The other two commits in the last 8 days (docs(readme), docs(reconcile)) are themselves doc commits and already reflect their own changes.
• Repo metadata, LICENSE/SECURITY/CHANGELOG scaffolding, and anything under .github/ per the task's scope.