feat(mcp): add official registry server packet

[aryasaatvik]

Summary

• add the official MCP Registry server.json for Samva
• correct repository provenance to the canonical SamvaHQ/samva repository and pin its GitHub ID
• document domain authentication, validation, and the explicit publish gate

Validation

• bunx --package ajv-cli ajv validate -s <(curl -LfsS https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json) -d server.json
• bun run format:check
• bun run validate:agent-plugin
• HTTP reachability checks for documentation, icon, and protected-resource metadata
• gh api repos/SamvaHQ/samva provenance check

Publish boundary

This PR intentionally does not run mcp-publisher publish or submit to the external registry. The future DNS-authenticated command is documented in docs/mcp-registry.md and requires an explicit approval gate.

[github-actions]

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[greptile-apps]

Greptile Summary

The PR adds the official MCP Registry packet for Samva’s hosted server and documents its validation, DNS authentication, and explicitly gated publication process.

• Declares the canonical server identity, repository provenance, icon, documentation, and streamable HTTP endpoint.
• Documents local validation and keeps external registry publication out of ordinary CI and review workflows.

Confidence Score: 5/5

The PR appears safe to merge with no concrete blocking or independently actionable non-blocking issues identified.

The new manifest aligns with existing repository documentation and endpoint conventions, while publication remains a deliberate manual operation protected by an explicit approval gate.

Important Files Changed

Filename	Overview
server.json	Adds a registry manifest whose endpoint, transport, documentation, and repository metadata are consistent with the repository’s existing MCP configuration.
docs/mcp-registry.md	Adds clear validation and DNS-authenticated publication instructions with an explicit prohibition against publishing during routine CI or review.

_{Reviews (1): Last reviewed commit: "feat(mcp): add official registry server ..." | Re-trigger Greptile}