feat: Refactor communication context to generalize from Jeff to current manager and enhance people management structure

ai/context/people/index.md

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+# People Index
+
+## Active Roles
+
+- Manager: [jeff-dewitte.md](./jeff-dewitte.md)
+
+## Known People
+
+- [jeff-dewitte.md](./jeff-dewitte.md)
+  Current direct manager for the active Fidelity project.
+
+- [santosh.md](./santosh.md)
+  Project-related contact seen in issue discussions. Exact formal role should be clarified if it becomes important for repeated communication.
+
+## Usage
+
+When a person appears repeatedly in project communication, create or update their file here so the agent can reuse:
+
+- name
+- role
+- relationship to the project
+- communication expectations
+- important context about how they influence work