v0.18.4

Fixes the remaining reproduced inspection/remote-command classification gaps,
repeated guidance overhead, and two memory-estimate retention defects.

• AWS retry settings/SSO, hosted Benmore uploads/description, archive reads,
  command lookup, formatting and finite jq grouping/extrema use native handling.
• Home aliases and finite file:line/upload loops retain checked runtime arguments.
• Concurrent hooks claim guidance atomically; repeated queue context is shorter.
  SessionStart still restores full guidance after resume or compaction.
• Failed jobs retain observed peaks for upward-only learning. Recently refreshed
  estimates survive cache churn.

The earlier cross-session Stop ownership fix remains covered. No live policy,
reservation floor, signal authority, hook definition, profile or trust change is
required. Stable-path hooks use the update immediately; existing supervisors keep
their loaded code until completion.

Validation counts and remaining limits are recorded in
the investigation.
Admission still enforces physical headroom and pressure; this is not a no-wait or
zero-red guarantee.