refactor Ring class

[wokron]

No description provided.

[Copilot]

Pull request overview

This PR refactors condy::Ring toward RAII construction (constructor initializes; destructor exits) and moves ring-adjacent helpers (FdTable, BufferTable, RingSettings) out of Ring/into runtime-owned components, updating tests to the new APIs.

Changes:

• Replace Ring::init() / Ring::destroy() usage with Ring(entries, params) construction across tests.
• Make Runtime own FdTable, BufferTable, and RingSettings instead of delegating through Ring.
• Extract FdTable/BufferTable/RingSettings into a new include/condy/ring_settings.hpp header.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
tests/test_ring.cpp	Update tests to construct Ring directly (no init/destroy calls).
tests/test_op_finish_handle.cpp	Update ring creation to new constructor-based API.
tests/test_fd_table.cpp	Switch table access from Context::ring() to Context::runtime().
tests/test_buffers.cpp	Update ring creation to new constructor-based API.
tests/test_buffer_table.cpp	Switch table access to runtime-owned tables; update clone test setup.
include/condy/runtime.hpp	Refactor runtime ring construction; move tables/settings to runtime members; adjust thread-local ring creation.
include/condy/ring.hpp	Remove init/destroy pattern; add throwing constructor + RAII teardown; update SQPOLL checks.
include/condy/ring_settings.hpp	New header containing FdTable, BufferTable, and RingSettings.

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