Adopt MariaDB project test harness

[brandonpayton]

Summary

Adopts the MariaDB project test harness work from the PR #3 reference branch into Kandelo, with current Node and browser host validation captured on the integration/kad-qun-mariadb-tests branch.

Scope included in this integration branch:

• MariaDB project test runners for mysql-test/main, including Node and browser entry points.
• Browser MariaDB test page and VFS image support needed to run the suite in the browser host.
• Host/runtime fixes uncovered while making the MariaDB suite fail loudly and classify failures instead of hanging or masking broken subprocess paths.
• Durable status documentation in docs/mariadb-project-tests.md.

Tracking epic: kad-qun.
Reference PR: brandonpayton#3.

MariaDB mysql-test/main final status

Full-suite artifacts now cover all 1183 upstream mysql-test/main tests on both supported hosts. Node used:

scripts/run-mariadb-project-tests.sh --host node --all --chunk-size 10 --timeout-ms 60000

Browser used:

LD_LIBRARY_PATH=/tmp/pwdeps/root/usr/lib/x86_64-linux-gnu${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH} MARIADB_BROWSER_RUNNER_RETRIES=3 scripts/run-mariadb-project-tests.sh --host browser --all --chunk-size 10 --timeout-ms 60000

Host	Artifact	PASS	FAIL	XFAIL	XPASS	SKIP	TOTAL	Exit
Node	test-runs/mariadb-project/kad-qun.4-node-20260613T112749Z/ plus focused reruns for chunks 54/55/56/92	608	18	317	0	240	1183	1
Browser	test-runs/gastown-mariadb-browser-full-pr3/	559	371	0	0	253	1183	1

The Node artifact's raw primary-wrapper count of 596 PASS / 27 FAIL / 311 XFAIL / 0 XPASS / 239 SKIP / 1173 TOTAL is superseded by the reconciled total above because chunk 56 hit the known zero-result harness path (kad-lf9) and chunks 54, 55, 56, and 92 have authoritative focused reruns. The browser artifact already folds its pre-rebase chunks 1-49 and post-rebase resumed chunks 50-119 into one final total.

Post-artifact fixes already landed on the integration branch but are not folded into these hard totals without a rerun: kad-qun.14, kad-qun.16, kad-qun.17, and kad-qun.18.

Detailed follow-up inventory is in docs/mariadb-project-tests.md#failure-inventory-for-follow-up-routing: it lists all 18 Node unexpected failures individually and accounts for the 371 browser FAIL rows by clusters whose counts sum to the hard browser total.

Known follow-ups

Remaining tracked follow-ups are intentionally left as narrow beads rather than blocking this PR:

• kad-lf9: Node wrapper must fail loudly when a child harness run produces zero result rows.
• kad-qun.9: browser wrapper should run from resolver-fetched artifacts in a fetch-only worktree.
• kad-qun.10: browser all-suite runner needs stronger isolation after timeouts, page death, or contaminated MariaDB state.
• kad-qun.20: Node optimizer/range/subselect/window failures need root-cause classification or timeout/resource-envelope treatment.
• kad-qun.21: Node sp_stress_case still needs isolated memory-envelope classification after the mysql.proc recovery fix.
• kad-qun.23: browser MariaDB expected-fail classifications need to cover release-build, plugin/event-scheduler, unsupported helper, and SQL-result limitations that currently appear as raw FAIL rows.
• kad-qun.24: browser VFS fixture coverage needs std_data, timezone, locale, charset, and cross-suite include path gaps fixed or classified.
• kad-qun.25: browser VFS/storage-state short reads, read-only tables, file descriptor/resource errors, and corrupted table/index rows need focused reproduction and classification.

Verification

Latest kad-qun.22 report-update verification on the integration branch:

• cargo test -p kandelo --target aarch64-apple-darwin --lib: 883 passed, 0 failed.
• cd host && npx vitest run: 76 files passed, 24 skipped; 634 tests passed, 109 skipped.
• scripts/run-libc-tests.sh: PASS=302, FAIL=0, XFAIL=20, XPASS=0, FLAKY=2, BUILD=0, TIMEOUT=0, TOTAL=324.
• scripts/run-posix-tests.sh: PASS=174, FAIL=0, XFAIL=3, XPASS=0, SKIP=2, BUILD=0, UNRESOLVED=0, TIMEOUT=0, TOTAL=179.
• scripts/dev-shell.sh bash scripts/check-abi-version.sh: passed; snapshot/header/TS bindings in sync and ABI_VERSION consistent. Direct ambient bash scripts/check-abi-version.sh used stable Cargo on this host and failed before the canonical dev-shell rerun.

This PR is left open for human review. It should not be merged by the final PR handoff agent.

[github-actions]

Phase B-1 matrix build status — pr-694-staging

ABI v15. 7 built, 0 failed, 7 total.

Package	Arch	Status	Sha
kandelo-sdk	wasm32	built	4acc0935
mariadb-test	wasm32	built	f1ccd75d
rootfs	wasm32	built	c92afe60
shell	wasm32	built	16f0839a
lamp	wasm32	built	a7a1c0a9
node-vfs	wasm32	built	29cae749
wordpress	wasm32	built	c43a94fe

_{Auto-generated; replaced on each push. Raw data in the publish-status workflow artifact.}