CI: Regenerate docs/bootstrap-inventory.md before ci-common --check

[PurHur]

Problem

script/ci-common.sh runs php script/bootstrap-inventory.php --check early in both ci-fast.sh and ci-local.sh. When docs/bootstrap-inventory.md drifts from the generator (file count / blocker table changes on master without a committed regen), the entire gate exits 1 before PHPUnit:

Stale /compiler/docs/bootstrap-inventory.md; run: php script/bootstrap-inventory.php

Batch 50 harness verify hit this on ./script/docker-ci-local.sh even though MiniWebApp AOT link tests pass after manual regen.

Goal

Contributors and harness hosts do not get a false-red full CI from inventory drift alone.

Scope (pick one in PR)

A (preferred): In script/ci-common.sh, run php script/bootstrap-inventory.php (write) when --check would fail, then continue — same pattern as docs/capabilities.md regen in CI.

B: Move --check to ci-fast only after a documented make bootstrap-profile prerequisite.

C: Loosen --check to warn unless BOOTSTRAP_INVENTORY_STRICT=1.

Implementation hints

Piece	File
Check	script/bootstrap-inventory.php --check
Hook	script/ci-common.sh (before capability matrix checks)
Doc	docs/bootstrap-selfhost.md, #212

Acceptance criteria

# Touch lib/ to change inventory, run CI without manual regen:
./script/ci-fast.sh   # exits 0 (regen or warn per chosen option)

./script/docker-ci-local.sh --filter VMTest

Committed docs/bootstrap-inventory.md stays in sync on PRs that change bootstrap blockers (optional follow-up: pre-commit note in #48).

Dependencies

• Milestone: Self-host — compile php-compiler with php-compiler (bootstrap) #212 self-host inventory
• Orthogonal to CI: Run JIT compliance tests in CI (fix LLVM skip in PHPUnit) #98 / Infrastructure: LLVM 9 → 14+ upgrade and CI matrix #174 LLVM work

Verification

Local/Docker only — not GitHub Actions.

Links

• script/bootstrap-inventory.php, docs/bootstrap-inventory.md
• ROADMAP 🗺️ ROADMAP: Compile a small PHP web application (living document) #78 Phase 0 Foundation