fix(dgram): expose socket shape stub

[andrewtdiz]

Summary

• Add runtime-only node:dgram namespace/socket shape stubs for createSocket, Socket, and socket method fields.
• Register dgram in the API manifest/native dispatch and keep socket method value reads callable.
• Remove the now-passing test_parity_dgram known-failure entry and regenerate API docs.

Verification

• cargo check -p perry-runtime -p perry-hir -p perry-codegen -p perry-api-manifest
• cargo test -p perry-codegen --test manifest_consistency
• ./run_parity_tests.sh --filter test_parity_dgram
• ./scripts/regen_api_docs.sh
• cargo fmt --all -- --check
• ./scripts/check_file_size.sh
• jq empty test-parity/known_failures.json
• git diff --check

[andrewtdiz]

Merged current origin/main into this branch and resolved the API manifest/doc conflicts by keeping the mainline module.SourceMap entry plus the dgram socket shape stubs. Regenerated docs now report 1823 entries across 90 modules.\n\nLocal verification:\n- cargo fmt --all -- --check\n- git diff --check && git diff --cached --check\n- ./scripts/check_file_size.sh\n- ./scripts/regen_api_docs.sh equivalent using the freshly built release binary

[andrewtdiz]

Updated this branch after the latest mainline merge.\n\n- The branch was already rebased/merged up to origin/main on the fork ref I fetched.\n- Added the shared cargo-test disk-pressure mitigation to the CI workflow.\n- Local checks passed: cargo fmt --all -- --check, git diff --check, scripts/check_file_size.sh, and workflow YAML parsing.

[andrewtdiz]

Fixed the cargo-test failure from the latest run.

The failing test was stable_hash::tests::expr_variant_stable_hash_tags_are_unique, caused by duplicate Expr stable-hash tag 12043 for RegExpEscape and StringRaw. I applied the same RegExpEscape stable-hash tag fix used on #3414.

Local checks passed: CARGO_TARGET_DIR=/root/perry/target cargo test -p perry-hir stable_hash::tests::expr_variant_stable_hash_tags_are_unique, cargo fmt --all -- --check, and git diff --check HEAD~1..HEAD.

[andrewtdiz]

Fixed the cargo-test failure by merging current origin/main, which now carries the ReflectIsExtensible stable-hash tag correction for the RegExpEscape collision.

Local checks passed: CARGO_TARGET_DIR=/root/perry/target cargo test -p perry-hir stable_hash::tests::expr_variant_stable_hash_tags_are_unique and git diff --check.