Fix cross-platform CI failures

[attahn]

Fixes the current cross-compilation and sanitizer failures.

• make Windows and WASI runtime shims portable
• remove UBSan-reported undefined behavior
• fix plugin compilation and flaky blocking tests
• restore the claims-gate dependency and scope ASan to invalid memory access

Tests: cargo test passed, sanitizer checks passed, and all cross artifacts validated.

@coderabbitai review

Summary by CodeRabbit

• Bug Fixes

  • Improved zigzag integer encoding robustness and refined JPEG DCT DC evidence extraction.
  • Updated hot-reload stamp computation.
  • Improved string equality and adjusted WASI file/path behaviors; enhanced Windows time handling compatibility.

• Tests

  • Strengthened JPEG DCT DC assertions.
  • Made IPv6 TCP/UDP loopback tests more reliable with consistent timeouts and non-blocking accepts.
  • Simplified hot-reload swap assertion for clearer verification.

• Chores / CI

  • Added mandatory ripgrep availability checks and updated sanitizer run configuration (leak detection disabled).

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 4067cf70-04dc-4e85-887c-b8fc644105bf

📥 Commits

Reviewing files that changed from the base of the PR and between c6bf09a and 370728f.

📒 Files selected for processing (1)

• examples/testing/net_ipv6_he_test.mko

🚧 Files skipped from review as they are similar to previous changes (1)

• examples/testing/net_ipv6_he_test.mko

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📝 Walkthrough

Walkthrough

Runtime portability and WASI behavior are updated, integer and JPEG encoding paths are made width-safe, hot-reload hashing and string comparison change, and networking tests and CI settings are adjusted.

Changes

Runtime and validation updates

Layer / File(s)	Summary
Platform and WASI compatibility runtime/mako_platform.h, runtime/mako_plugin.h, runtime/mako_rt.h	Windows time shims use Mako-prefixed functions with macro aliases; plugin headers rely on mako_rt.h; WASI filesystem operations receive compatibility branches.
Runtime data and hashing behavior runtime/mako_domain.h, runtime/mako_goext.h, runtime/mako_rt.h, runtime/mako_std.h	String comparison, hot-reload stamp mixing, zigzag encoding, and JPEG DCT value reconstruction are updated.
Networking test control flow examples/testing/net_ipv6_he_test.mko	IPv6 TCP and UDP tests use 5000ms timeouts, readiness waits, and non-blocking accept handling.
Test and CI execution updates examples/testing/goext_wave5_test.mko, examples/testing/residual_seeds_test.mko, .github/workflows/ci.yml, scripts/claims-gate.sh	Tests assert updated JPEG and hot-reload behavior; claims-gate requires ripgrep; and ASan leak detection is disabled for the suite.

Estimated code review effort: 3 (Moderate) | ~20 minutes

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 50.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title matches the main theme of the changes: fixing cross-platform CI and portability failures.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[attahn]

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