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/marketing.yaml

@@ -0,0 +1,25 @@
+id: marketing
+title: Marketing
+description: >-
+  A marketing org that owns strategy, content, channels, and growth. The
+  marketing-lead sets strategy and budget and runs a roster of content, copy,
+  SEO, social, brand, growth, and UX specialists.
+lead: marketing-lead
+floor:
+  - marketing-lead
+roster:
+  - class: marketing-lead
+  - class: content-strategist
+    reports_to: marketing-lead
+  - class: copywriter
+    reports_to: content-strategist
+  - class: seo-specialist
+    reports_to: marketing-lead
+  - class: social-media-manager
+    reports_to: content-strategist
+  - class: brand-strategist
+    reports_to: marketing-lead
+  - class: growth-marketer
+    reports_to: marketing-lead
+  - class: ux-designer
+    reports_to: marketing-lead