Testing: Regenerate examples benchmark AOT row for 003 after #568

[PurHur]

Problem

#491 added VM/JIT benchmark columns for examples/003-MiniWebApp with AOT columns n/a until native user-class link.

#752 ✅ closed — phpc build --project links on harness. The public examples/README.md benchmark table still shows n/a for bin/compile.php and ./compiled because #764 blocks non-empty execute.

Without this gate, the README table stays misleading after link lands but before execute.

Goal

When LLVM is ready and link succeeds and execute returns HTML (#764 green):

• script/rebuild-examples.php times phpc build --project + runs .phpc/bin/app with PATH_INFO/QUERY_STRING env (Docs: Add 003-MiniWebApp row to examples benchmark table when VM green #491 contract)
• Regenerates examples/README.md between benchmark markers
• Stays n/a when LLVM missing, link fails, or stdout empty (no CI failure)

Scope

• Extend script/rebuild-examples.php 003 branch: BENCH_MINIWEBAPP=1 + LlvmToolchain::isReady()
• Execute probe: QUERY_STRING=route=home or PATH_INFO=/home — match VM column
• test/unit/RebuildExamplesTest.php — documents skip when AOT: MiniWebApp native binary CLI execute emits empty stdout (post-link) #764 open
• Regenerate table after AOT: MiniWebApp native binary CLI execute emits empty stdout (post-link) #764 + Testing: MiniWebAppAotExecuteTest CLI smoke (#485, #676 step 2) #747 green

Implementation hints

File	Notes
script/rebuild-examples.php	Call phpc build --project examples/003-MiniWebApp; run binary via subprocess + env
examples/README.md	Auto-updated; hand-edit only outside markers
Makefile	MINIWEBAPP_LINT_GATE=1 ./script/rebuild-examples.php

# After #764 on branch with LLVM:
BENCH_MINIWEBAPP=1 php script/rebuild-examples.php
grep 003-MiniWebApp examples/README.md

Acceptance criteria

• With execute green, 003 row shows numeric bin/compile.php and ./compiled columns
• With AOT: MiniWebApp native binary CLI execute emits empty stdout (post-link) #764 open, script prints skip reason and leaves n/a (exit 0)
• ./script/ci-fast.sh --filter RebuildExamples passes

Docker:

docker run --rm -v "$(pwd):/compiler" -w /compiler php-compiler:22.04-dev \
  ./script/ci-fast.sh --filter RebuildExamples

Dependencies

• AOT: MiniWebApp phpc build --project native link fails on master (post-#568/#734) #752 ✅ link
• AOT: MiniWebApp native binary CLI execute emits empty stdout (post-link) #764 — execute (blocks populated AOT columns)
• Docs: Add 003-MiniWebApp row to examples benchmark table when VM green #491 — VM column env contract
• Testing: Regenerate examples benchmark AOT row for 003 after #568 #716 self; Docs: Sync examples/README + 003 README with live MiniWebApp AOT status #753 docs sync

Links

• Docs: Sync examples/README + 003 README with live MiniWebApp AOT status #753, Docs: Regenerate capabilities-syntax AOT rows post-#568 #744, ROADMAP 🗺️ ROADMAP: Compile a small PHP web application (living document) #78