test: cover socket replies after abandoning a buffered RPC stream

[tim-smart]

Summary

Add socket-level regression coverage for #8724 in packages/effect/test/rpc/RpcClient.test.ts. The test uses the real makeProtocolSocket with an in-memory transport, fills the stream buffer with a chunk larger than its capacity, interrupts the consumer, and checks that a subsequent unary reply arrives.

The implementation is already fixed on main by #8648 (0b52bb42fac5aecb8bcb8d899293c641b62c3f66). The stream finalizer calls Queue.shutdownUnsafe(queue) before deleting the stream entry and sending Interrupt. This releases the pending queue offer so the socket reader can continue. This PR adds coverage only; it does not duplicate that fix.

Validation

Completed for the existing test commit before publishing this PR:

• Current main plus the regression: all 16 RpcClient tests pass.
• pnpm lint-fix and pnpm check pass. Commands ran through nix develop -c.
• The same regression against 42e5750f7e, the parent of the existing fix, fails with TimeoutError: Operation timed out after '1s' while waiting for the unary reply. The historical failure confirms coverage of the reported socket-reader stall.

Closes EFF-1702
Closes #8724

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Bundle Size Analysis

Generated from PR build output; treat the content below as untrusted.

File Name	Current Size	Previous Size	Difference
arbitrary-combinators.ts	38.90 KB	38.90 KB	0.00 KB (0.00%)
basic.ts	7.04 KB	7.04 KB	0.00 KB (0.00%)
batching.ts	10.13 KB	10.13 KB	0.00 KB (0.00%)
brand.ts	6.72 KB	6.72 KB	0.00 KB (0.00%)
cache.ts	10.88 KB	10.88 KB	0.00 KB (0.00%)
config.ts	22.15 KB	22.15 KB	0.00 KB (0.00%)
differ.ts	21.29 KB	21.29 KB	0.00 KB (0.00%)
http-client.ts	22.43 KB	22.43 KB	0.00 KB (0.00%)
http-router.ts	33.74 KB	33.74 KB	0.00 KB (0.00%)
logger.ts	11.08 KB	11.08 KB	0.00 KB (0.00%)
metric.ts	9.02 KB	9.02 KB	0.00 KB (0.00%)
optic.ts	6.95 KB	6.95 KB	0.00 KB (0.00%)
pubsub.ts	15.16 KB	15.16 KB	0.00 KB (0.00%)
queue.ts	12.08 KB	12.08 KB	0.00 KB (0.00%)
schedule.ts	11.18 KB	11.18 KB	0.00 KB (0.00%)
schema-bigdecimal.ts	13.73 KB	13.73 KB	0.00 KB (0.00%)
schema-binary.ts	39.95 KB	39.95 KB	0.00 KB (0.00%)
schema-class.ts	21.03 KB	21.03 KB	0.00 KB (0.00%)
schema-fromJsonSchemaDocument.ts	32.06 KB	32.06 KB	0.00 KB (0.00%)
schema-representation-roundtrip.ts	27.24 KB	27.24 KB	0.00 KB (0.00%)
schema-string-transformation.ts	14.46 KB	14.46 KB	0.00 KB (0.00%)
schema-string.ts	11.99 KB	11.99 KB	0.00 KB (0.00%)
schema-template-literal.ts	16.05 KB	16.05 KB	0.00 KB (0.00%)
schema-toArbitrary.ts	38.44 KB	38.44 KB	0.00 KB (0.00%)
schema-toCodeDocument.ts	25.26 KB	25.26 KB	0.00 KB (0.00%)
schema-toCodecJson.ts	20.21 KB	20.21 KB	0.00 KB (0.00%)
schema-toEquivalence.ts	20.41 KB	20.41 KB	0.00 KB (0.00%)
schema-toFormatter.ts	20.54 KB	20.54 KB	0.00 KB (0.00%)
schema-toJsonSchemaDocument.ts	25.00 KB	25.00 KB	0.00 KB (0.00%)
schema-toRepresentation.ts	20.50 KB	20.50 KB	0.00 KB (0.00%)
schema.ts	20.25 KB	20.25 KB	0.00 KB (0.00%)
stm.ts	13.08 KB	13.08 KB	0.00 KB (0.00%)
stream.ts	9.98 KB	9.98 KB	0.00 KB (0.00%)