dym sdk: add network filter sdk for golang/cpp

[wbpcode]

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[wbpcode]

copilot is used to help develop this feature. Let's me review it carefully first.

[wbpcode]

/gemini review

[gemini-code-assist]

Code Review

This pull request introduces the Network Filter SDK for dynamic modules, providing support for both C++ and Go. It includes the necessary ABI implementations, interfaces for network buffers and filter handles, and a shared scheduler component. Integration tests have been updated to verify the SDK across C++, Go, and Rust. Feedback focuses on improving the robustness of the Go SetMetadata implementation by logging unsupported types and addressing a potential use-after-free risk in the C++ SDK by using std::shared_ptr for HTTP callout callbacks.

[Copilot]

Pull request overview

Adds dynamic-modules network filter SDK support for Go and C++, plus new multi-language integration test modules to validate core network-handle operations (read-disable, connection state, half-close, buffer limits).

Changes:

• Introduces Go network filter shared APIs + Go ABI bridge for network filter callbacks.
• Introduces C++ network SDK headers/impl plus C++ ABI bridge for network filters (and shared scheduler refactor).
• Extends dynamic-modules network integration tests and adds Go/C++ test modules to the test data set.

Reviewed changes

Copilot reviewed 17 out of 17 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
test/extensions/dynamic_modules/test_data/go/network_integration_test/network_integration_test.go	New Go dynamic module implementing network-filter assertions for integration coverage.
test/extensions/dynamic_modules/test_data/go/BUILD	Adds the new Go test module build target.
test/extensions/dynamic_modules/test_data/cpp/network_integration_test.cc	New C++ dynamic module implementing network-filter assertions for integration coverage.
test/extensions/dynamic_modules/test_data/cpp/BUILD	Adds the new C++ test module build target.
test/extensions/dynamic_modules/network/integration_test.cc	Refactors test base + adds SDK-language parameterized network integration tests.
test/extensions/dynamic_modules/network/BUILD	Wires new Go/C++ test modules into the network integration test.
source/extensions/dynamic_modules/sdk/go/shared/network_base.go	Adds Go shared network handle/buffer/status types and interfaces.
source/extensions/dynamic_modules/sdk/go/shared/network_api.go	Adds Go network filter/factory/config-factory interfaces + empty implementations.
source/extensions/dynamic_modules/sdk/go/sdk.go	Adds Go registry and factory creation for network filters.
source/extensions/dynamic_modules/sdk/go/abi/network.go	Implements Go ABI exports and host-callback wrappers for network filters.
source/extensions/dynamic_modules/sdk/cpp/sdk_network.h	Adds C++ network filter SDK API surface and registry.
source/extensions/dynamic_modules/sdk/cpp/sdk_network.cc	Implements C++ network filter registry plumbing.
source/extensions/dynamic_modules/sdk/cpp/sdk_internal_network.cc	Implements C++ ABI exports/host-callback wrappers for network filters.
source/extensions/dynamic_modules/sdk/cpp/sdk_internal_common.h	Shared templated scheduler implementation for SDK ABIs.
source/extensions/dynamic_modules/sdk/cpp/sdk_internal.cc	Refactors HTTP scheduler impl to use shared template.
source/extensions/dynamic_modules/sdk/cpp/BUILD	Updates SDK build targets to include network SDK and ABI sources.
source/extensions/dynamic_modules/BUILD	Wires new Go shared/ABI sources into Bazel go_library targets.