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We need to allow the v1 query service to work with storage backends that implement the v2 tracestore.Reader…

We need to allow the v1 query service to work with storage backends that implement the v2 tracestore.Reader…: a task in LegoFlow-SWE (Harbor dataset). The adapter must be a type named SpanReader that: - Wraps a tracestore.Reader - Implements the spanstore.Reader interface - Provides a constructor…

The task

The adapter must be a type named `SpanReader` that: - Wraps a `tracestore.Reader` - Implements the `spanstore.Reader` interface - Provides a constructor `NewSpanReader(tracestore.Reader) *SpanReader`

Part of Lego-X/LegoFlow-SWE.