Support org role permissions on tool calls

[cobyeastwood183]

Environment

Cursor MCP

Steps to Reproduce

• Install from https://mcp.sentry.dev/?ide=cursor
• Be an sentry org owner
• In org settings toggle 'members create projects'
• Run create_project tool

Expected Result

Should create a project in the org.

Actual Result

Gives a 403 error.

[cobyeastwood183]

might need to update scopes (so they're based on org roles), or user context along with api calls?