Examples: Sync examples/README.md run matrix after #764 close

[PurHur]

Problem

Root README and examples/003-MiniWebApp/README.md were updated for #764 ✅ native execute, but examples/README.md still documents:

• Run matrix: 003-MiniWebApp native execute 📋 (#764)
• Section text: "native execute still returns empty stdout until AOT: MiniWebApp native binary CLI execute emits empty stdout (post-link) #764"

test/unit/ExamplesReadmeTest.php still asserts #764 appears in the readme (intentional until this issue lands). MiniWebAppUnskipMatrixTest expects matrix strings to move when gates flip.

#1525 covers root README + public status site; this issue is the examples tree contributor doc.

Goal

Update examples/README.md run matrix and 003 section to match master:

Mode	003-MiniWebApp
VM	✅
AOT link	✅
AOT execute	✅ (home, hello, contact POST; api/status → #1527)

Regenerate benchmark table row if script/rebuild-examples.php output changes.

Acceptance criteria

• examples/README.md no longer says execute blocked / empty stdout for 003
• ExamplesReadmeTest expectations updated (still reference 🌐 North Star 1: Web-capable PHP application (living tracker) #1044 / gate docs as needed)
• make web-smoke unchanged (lint-only)

./script/ci-fast.sh --filter ExamplesReadmeTest

Verification (local / Docker)

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

Dependencies

• AOT: MiniWebApp native binary CLI execute emits empty stdout (post-link) #764 ✅
• Docs: Sync North Star 1 status — README, #1044, development-status.md (#764 closed) #1525 — coordinate so root README and examples README stay consistent
• Docs: align self-host milestone counts with bootstrap inventory (#1522) #1527 — mention api/status test gap until closed

Links

• ROADMAP 🗺️ ROADMAP: Self-host + web-capable PHP subset (living) #78, North Star 🌐 North Star 1: Web-capable PHP application (living tracker) #1044