Fix SQLite all-mode mmap regressions

[brandonpayton]

Summary

This branch carries three related commits for the SQLite Tcl all audit:

1. Parent audit harness prep: outcome-list/reporting support for SQLite official and project-unit runs.
2. The kd-c5i.3 SQLite official all-mode mmap cluster fix.
3. The kd-c5i.3.4 ABI gate follow-up: add the abi CI suite entry and document the dev-shell-wrapped ABI checker invocation.

The child fix:

• Aligns pthread worker stacks to the Wasm C ABI 16-byte boundary before setting __stack_pointer.
• Links the direct SQLite CLI with a 1 MiB wasm stack so recursive .read tests report SQLite's own input nesting limit instead of trapping.
• Adds SQLite all-mode guest shell/path/platform shims for copied testrunner.tcl child jobs in Node and browser VFS runs.
• Extends the pthread example regression to cover worker stack alignment and alignment-sensitive 64-bit varargs formatting.

Package Test Results

• Baseline focused Node SQLite cluster: 1 pass, 2 fail, 0 skip, 1 incomplete; 266 completed cases, 9 case errors.
• Final focused Node SQLite cluster: 4 pass, 0 fail, 0 skip, 0 incomplete; 288/288 cases passed, SQLite reported 0 errors.
• Browser shell4 official selector: 1 pass, 0 fail, 0 skip, 0 incomplete; 22 cases, 0 errors.
• Browser minimal pthread SQLite snprintf repro: 1 pass, 0 fail, 0 skip.
• Browser official mmap sort2.test timed out and is tracked separately as kd-c5i.3.5.

Verification

• cargo test -p kandelo --target aarch64-apple-darwin --lib: 959 passed, 0 failed, 0 skipped.
• cd host && npx vitest run test/pthread.test.ts --reporter=json: 2 passed, 0 failed, 0 skipped.
• cd host && npx vitest run --reporter=json: 695 passed, 39 failed, 126 not-run/skipped-or-pending; all failures are missing fork-instrument fixture binaries in host/test/fork-instrument-coverage.test.ts and tracked as kd-c5i.3.2.
• scripts/run-posix-tests.sh: 174 pass, 0 fail, 2 skip unsupported, 3 xfail.
• scripts/run-libc-tests.sh: exited 0 but selected 0 tests; tracked as kd-c5i.3.3.
• bash scripts/dev-shell.sh bash scripts/ci-run-test-suite.sh abi: passed; ABI snapshot, libc/glue header, host TS bindings, and ABI_VERSION are in sync. The unsupported host-shell bash scripts/check-abi-version.sh stable-Cargo failure is classified and fixed for future agents by kd-c5i.3.4 docs/suite guidance.

Durable report and outcome-list paths are recorded on kd-c5i.3 and kd-c5i.3.4.

[github-actions]

Phase B-1 matrix build status — pr-770-staging

ABI v15. 52 built, 0 failed, 52 total.

Package	Arch	Status	Sha
bc	wasm32	built	3a78fb67
bzip2	wasm32	built	2ddc287d
coreutils	wasm32	built	2a18f004
curl	wasm32	built	a1ab622d
dash	wasm32	built	a4ab83b1
diffutils	wasm32	built	89790993
dinit	wasm32	built	b793ac0f
fbdoom	wasm32	built	d9296a33
file	wasm32	built	6a1455c3
findutils	wasm32	built	1237e4d0
gawk	wasm32	built	57c5d5cf
git	wasm32	built	7c88a387
grep	wasm32	built	235ddcd5
gzip	wasm32	built	481eb543
kandelo-sdk	wasm32	built	18869e79
kernel	wasm32	built	7f3002ad
less	wasm32	built	a4f09d75
lsof	wasm32	built	cbd163cd
m4	wasm32	built	f0aff0d3
make	wasm32	built	250d1d25
mariadb	wasm32	built	bccf7260
mariadb	wasm64	built	3df390c0
modeset	wasm32	built	703cfd80
msmtpd	wasm32	built	ec5df629
nano	wasm32	built	1cea23a0
ncurses	wasm32	built	8c54f1c2
netcat	wasm32	built	361622f8
nginx	wasm32	built	d3f35370
php	wasm32	built	c81ee5be
posix-utils-lite	wasm32	built	26ecd803
sed	wasm32	built	03befd20
tar	wasm32	built	bede734f
tcl	wasm32	built	9070fddb
unzip	wasm32	built	6591e7ef
userspace	wasm32	built	c3d7e154
vim	wasm32	built	0d02b67d
wget	wasm32	built	04bb22d8
xz	wasm32	built	f54f1e93
zip	wasm32	built	19152752
zstd	wasm32	built	45fa0e20
bash	wasm32	built	74f8e39c
mariadb-test	wasm32	built	76d2883a
mariadb-vfs	wasm32	built	37cbbded
mariadb-vfs	wasm64	built	a37c83f6
nethack	wasm32	built	51827b74
vim-browser-bundle	wasm32	built	63be56eb
nethack-browser-bundle	wasm32	built	6f83697f
rootfs	wasm32	built	bed032dc
shell	wasm32	built	bc60e6a2
lamp	wasm32	built	5fe3410c
node-vfs	wasm32	built	f286a3c5
wordpress	wasm32	built	33e16f14

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