[dannyward630]

Description

Use math.MaxInt for the default gRPC send and receive message-size options. The current math.MaxInt32 limit blocks messages above 2 GiB on 64-bit hosts. Add a regression test that checks the limit follows the platform's maximum int.

Related Issue

Fixes #184.

How Has This Been Tested?

• go test . -run '^TestGRPCMaxMessageSize$' -count=1 with Go 1.27.2 on Windows/amd64: passed.
• go vet ./... with Go 1.26.9 on Windows/amd64: passed.
• go test ./... was attempted with Go 1.26.9 and 1.27.2 on Windows; both runs failed at TestServerLogPanic (client_test.go:1608). The logs also report TerminateProcess: Access is denied from helper plugin processes.

Contributor Checklist

• LLM Usage I used Codex to help prepare the change, read and followed the AI usage guide, reviewed the diff, and understand the submitted code.

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