feat: Add historical context files for team members and update project documentation with Slack archive import details

ai/context/people/raj-sundararaj.md

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+# Raj Sundararaj
+
+## Role
+
+Repeated Fidelity collaborator involved in project coordination and active issue triage.
+
+---
+
+## Known Context
+
+- Repeatedly surfaced or assigned XFlow/AO issues and asked for current status
+- Involved in release coordination, validation follow-up, and backlog movement
+- Relevant when the team needed to align issue ownership, repro state, or urgency with consumer-side expectations
+
+---
+
+## Guidance
+
+- Treat Raj as a useful contact for issue routing, AO coordination, and release follow-up
+- If future context clarifies the formal role/team, update this file directly