Node refactors profiling, debugger, and Temporal

FFI dynamic libraries now stay alive with generated functions (9c01018)

Fixes a lifetime bug where a DynamicLibrary could be garbage-collected while a function obtained from it was still in use. The new test covers the regression by forcing GC and verifying calls still work until the library is explicitly closed.

Temporal is included in frozen intrinsics (637a98a)

Adds Temporal and its prototype objects to the frozen intrinsics list when Temporal support is enabled. This keeps the intrinsic snapshot consistent with other built-ins and avoids leaving Temporal objects mutable when the runtime freezes intrinsics.

Profiling helpers split out of util (9ab960a)

Moves heap profiling serialization logic into new dedicated src/node_profiling.* files and updates the build to compile them. This is a substantial internal refactor that improves separation of concerns without changing public behavior.

Debugger probe logic moved into separate files (6a94957)

Extracts probe/session helper code from lib/internal/debugger/inspect.js into new internal modules. The main inspector file shrinks dramatically, making the debugger code easier to maintain and reducing the coupling between startup logic and probe helpers.

Other misc changes

• Tools and CI workflow cleanup, including OpenSSL matrix generation migration to Nix and skipping unrelated test-linux runs on tools-only changes.
• Temporal tests now use a shared hasTemporal helper instead of the V8 flag.
• Web Streams promise-handling utility simplified.