feat(fleet): system-type profiles — declarative roster+topology mapping (H2)

Add declarative system-type profiles: framework/fleet/profiles/*.yaml map a
system type to a persona roster + org topology (reports_to, multiplicity).
Profiles are DATA, seeded like roles, so an operator declares a system type and
gets the matching roster from the baseline library with no code change
(NS-9 / AC-NS-6).

- 5 baseline profiles: software-delivery, personal-assistant, research,
  business (company-in-a-box), marketing.
- fleet-profiles.ts: loadProfiles/loadProfile/parseProfile/validateProfile +
  listPersonaClasses (extracts valid classes from the role library by unioning
  inline `class:` markers, LIBRARY.md rows, and role filenames so marker-less
  personas like planner/decomposition resolve).
- CLI: `mosaic fleet profile list|show [--json]`; invalid profiles exit non-zero.
- Spec covers parse/validate, the library-drift guard (every referenced class
  resolves against the real role library), and unknown-class/reports_to rejection.
- install.sh: profiles seed via the existing rsync (comment clarified; the
  preserved top-level `fleet/*.yaml` glob does not shadow fleet/profiles/*.yaml).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

packages/mosaic/framework/fleet/profiles/business.yaml

@@ -0,0 +1,30 @@
+id: business
+title: Business (Company-in-a-Box)
+description: >-
+  A full company org: the CEO sets direction, the COO and CFO run execution and
+  finance, and the functional leads (product, marketing, sales, operations,
+  customer success) plus a small engineering slice deliver the work. reports_to
+  encodes the org chart.
+lead: ceo
+floor:
+  - ceo
+roster:
+  - class: ceo
+  - class: coo
+    reports_to: ceo
+  - class: cfo
+    reports_to: ceo
+  - class: product-manager
+    reports_to: coo
+  - class: marketing-lead
+    reports_to: coo
+  - class: sales-lead
+    reports_to: coo
+  - class: operations-manager
+    reports_to: coo
+  - class: customer-success-manager
+    reports_to: coo
+  - class: code
+    reports_to: product-manager
+  - class: review
+    reports_to: product-manager