[codex] expose stream class static values

[andrewtdiz]

Summary

Refs #2521.

This fixes the remaining node:stream class static value-read surface where direct compiler-recognized static calls worked, but property reads and captured references returned undefined.

• Attach callable static method values to Readable, Writable, Duplex, Transform, and PassThrough constructors with Node-compatible .length values.
• Route captured static references through the existing stream runtime helpers, with shape-stable toWeb method-value wrappers for detached calls.
• Add a focused Node/Perry parity fixture for static reads, namespace identity, captured references, and detached helper calls.

This does not change the broader adapter data-flow, cancel/error/backpressure behavior, or stream iterator-helper behavior.

Validation

• timeout 30 npm exec --yes --package=node@26 -- node --experimental-strip-types test-parity/node-suite/stream/static/class-static-exports.ts > /tmp/node_stream_static_exports.out
• PERRY_NO_AUTO_OPTIMIZE=1 target/debug/perry test-parity/node-suite/stream/static/class-static-exports.ts -o /tmp/perry_stream_static_exports
• timeout 30 /tmp/perry_stream_static_exports > /tmp/perry_stream_static_exports.out
• diff -u /tmp/node_stream_static_exports.out /tmp/perry_stream_static_exports.out
• cargo test -p perry-runtime stream_constructors_expose_static_method_values --lib
• cargo build -p perry-runtime -p perry-stdlib
• cargo fmt --all -- --check
• git diff --check