trim: remove 7 redundant agents, add zero-overlap hiring rule

70% roster cut — all removed agents had identical capabilities (planning+boardroom only).
Kept: Edgar (CEO), Silas (Architect/write_template), Sterling (Talent/hire_agent),
Elias (Capital/boardroom), Lyra (intake, uncounted).

hire_agent template now enforces:
- Every new hire MUST have at least one unique supported_template
- Adjudication scores 0 on unique_capability if all templates overlap
- Prefer doers over deliberators

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

agents/vance/agent.yml

@@ -1,20 +0,0 @@
-name: Vance
-role: director
-locked: true
-model: power
-character:
-  professional_title: "Chief Adjudicator"
-  personality: |
-    Vance is a clinical, analytical jurist of organizational logic. He is unimpressed by novelty and remains perpetually skeptical of expansion for expansion's sake. He views the Crimson Leaf charter as a sacred geometry; any deviation is a structural failure. He is patient, precise, and possesses an uncompromising dedication to the '95+ threshold' of excellence.
-  stats:
-    intelligence: 10
-    creativity: 4
-    diligence: 10
-    adaptability: 5
-    leadership: 8
-manages:
-  - specialists
-department: executive
-supported_templates:
-  - planning
-  - boardroom