chore(fleet): re-home the profile/skill tree to the armonissima vault; multi-root skill validation

[aarontrowbridge]

What

The internal-content half of the amico-plugin dissolution (stacked on #255, the public half). profiles/, gates/, and the 28 internal skills now live in the armonissima team vault (pushed as armonissima@3d78491); mount presence is the eligibility proof — the same pattern as the retired plugin checkout, carried by the vault sync instead of a git clone.

The real change: multi-root skill validation in profile_verb

The shipped fleet presets compose both skill tiers — e.g. researcher stages amico-vault + hypothesis-review (public) alongside internal skills. A single --skills-dir cannot name two roots, and the old default (~/harmoniqs/amico-plugin/profiles) never existed on main, which is why the 12 shipped-preset tests were permanent skips.

• --skills-dir is now repeatable; any explicit flag(s) replace the defaults.
• Skill existence + surface: is a union check across roots, first-hit wins (matching the library resolver).
• Defaults: the vault's skills/ + the extension's in-repo public library when resolvable from the installed bundle layout (bin/dist/amico.js → ../../skills); self-disables in dev/CI.

Result: the 12 preset tests run for the first time and pass — amico-run suite is 952 passed / 0 skipped (was 940 + 12 skips).

Canonicity sweep

The mounts resolver (amico-run/src/mounts.ts) and mount_store.ts were ported from the Claude session-start hook with a "parity oracle" relationship. The hook is retired with the plugin repo — the TS ports are now declared canonical and the fixtures are the spec. profile_verb's lint-port comments re-point at the vault tree; lens_registry's deviation note resolves to "the design"; verbs.ts / ledger_dispatch.ts comments updated.

Verification

• amico-run: 952 passed / 0 skipped; extension: 868 passed / 1 skipped; both typechecks clean.
• The shipped armonissima presets (researcher, experimenter, engineer, librarian-insight, dreamer, default) resolve in both dispatch and spool-up modes against the two-root union.

Follow-ups

• wip/fleet-profiles on amico-plugin should die unmerged — its content landed in the vault.
• Phase 3: plugin tombstone + archive after soak; vault-sync daemon sources move to the amico repo.