WIP: Flight with arrow

[lmangani]

needs resync w/ latest arrow

[Copilot]

Pull Request Overview

This PR prepares the FlightSQL server to use Arrow streaming by introducing a QueryArrow stub, refactoring ticket handling, and updating tests and dependencies to align with the latest Arrow client API.

• Added QueryArrow stub to QueryClient and imported Arrow packages
• Refactored FlightSQLServer to encode tickets as base64 and call QueryArrow in DoGet
• Replaced legacy convertResultsToArrow tests with a basic FlightSQL server connection test
• Updated go.mod to pull in new Arrow and other module versions

Reviewed Changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated 2 comments.

File	Description
querier/queryClient.go	Added Arrow imports and unimplemented QueryArrow method stub
querier/flightsql.go	Removed in-memory storage, refactored GetFlightInfo/DoGet to use QueryArrow and base64 tickets
querier/flightsql_test.go	Dropped old conversion tests, added server startup helper and connection test
go.mod	Added/moved Arrow modules and bumped several indirect dependencies

Comments suppressed due to low confidence (1)

querier/flightsql_test.go:31

• There is no Initialize method on QueryClient; this will cause a compilation error. Use the correct initialization method or implement Initialize on QueryClient.

	_ = qc.Initialize()