1930f19b1a
SiteScriptCompileCache.Hits is a process-global counter; other test classes in the assembly compile scripts concurrently (not in this serialized collection), so an exact post-Clear count is non-deterministic under a full-assembly parallel run. Assert.Same(r1,r2) remains the definitive proof of one shared Roslyn compile. Integration-surfaced; belongs with plan R2-03 T5/T6.