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

ai/context/people/gurram-santosh.md

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+# Gurram Santosh
+
+## Role
+
+Project-related contact involved in issue discussions.
+
+The exact formal role is not yet confirmed in workspace memory.
+
+---
+
+## Known Context
+
+- Repeatedly appears in AO-related testing, screenshot validation, and issue verification conversations
+- Often serves as a consumer-side validator or reporter when the team needs confirmation that a fix worked in their environment
+- Relevant when tracking whether an issue still reproduces, whether a release build contains a fix, or whether additional consumer validation is needed
+
+---
+
+## Guidance
+
+If future communication makes Santosh's role explicit, update this file with:
+
+- team or function
+- relationship to Fidelity work
+- whether the person is a reporter, tester, partner, or stakeholder