add async_cmd_getsockname

[wokron]

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[Copilot]

Pull request overview

Adds a new io_uring “command” wrapper for getsockname to the Condy async operations layer, along with tests and documentation updates.

Changes:

• Add condy::async_cmd_getsockname() wrapper (guarded for liburing >= 2.13).
• Add basic and fixed-fd test cases for async_cmd_getsockname().
• Update ops documentation to include async_nop128() and async_cmd_getsockname().

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
include/condy/async_operations.hpp	Introduces the new async_cmd_getsockname() wrapper using the existing op-awaiter pattern.
tests/test_async_operations.4.cpp	Adds new test coverage for async_cmd_getsockname() and fixes SO_REUSEADDR option value initialization in existing tests.
docs/ops.md	Documents the newly exposed operations in the operation list.

Comments suppressed due to low confidence (1)

tests/test_async_operations.4.cpp:302

• In the "cmd_sock - fixed fd" test, listen_fd is never closed after sync_wait, unlike the other socket tests in this file. This can leak file descriptors across the test suite; add a close(listen_fd) (or a RAII/defer cleanup) after the coroutine completes.

        int val = 1;
        r = co_await condy::async_cmd_sock(SOCKET_URING_OP_SETSOCKOPT,
                                           condy::fixed(0), SOL_SOCKET,
                                           SO_REUSEADDR, &val, sizeof(val));
        REQUIRE(r == 0);

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