fix(node:vm): reject empty cached data and cover execution modes

[steipete]

The vm.Script constructor now distinguishes explicitly empty cachedData from an omitted option. Empty data reports cachedDataRejected === true, executes the source normally, and still supports produceCachedData regeneration, matching Node 24.

This extends the standalone JIT-unavailable fix in #118 (adapted from oven-sh#41769, thanks @robobun). That fix removes a synchronous baseline compilation of a decoded block that cannot execute. This follow-up preserves decode-only acceptance and owned payload lifetime, and depends only on fork main: no WebKit artifact or private-cache promotion changes.

Fresh-process regressions cover default, interpreter, baseline, DFG, and FTL configurations. Each exercises produceCachedData, createCachedData() before/after execution, consumption in a separate process, execution in all three context forms after buffer mutation/GC, empty/junk/truncated/source-mismatched data, regeneration, and rejection of a real Bun 1.4.2 payload. The identical assertion fixture passes under Node 24.21.0.

The requested broader Node VM run also exposed three stale column expectations from the earlier stack-position fix. This PR corrects those specific expected columns while retaining the filename, line-offset, column-offset, and caret checks. The corrected tests pass on unchanged main, the candidate, and Node 24.

Native Linux release/no-LTO proof against the published WebKit artifact:

• Pre-fix 4540c115f3: interpreter repro exits 139. LLDB shows constructScript → JIT::compileSync → emitSlow_op_enter → JITThunks::ctiStub(this=null) → RecursiveLockAdapter::lock(this=0x4e0).
• Unchanged main a852955d800: the crash repro passes; all five new empty-cache cases fail as expected.
• Candidate: 363 VM tests pass, with the existing 3 skips and 60 TODOs unchanged; all five mode regressions pass; all 47 fork-selection results pass.
• Node-derived VM suite: all 99 result rows pass for both unchanged main and candidate with the corrected fixtures (original fixtures had the same three failures in both arms).
• OpenClaw Code Mode consumer checks pass under Bun in both arms, with isolated HOME/state/temp directories.
• Complete final diff: scoped-clean Codex P2 autoreview. Formatting and JavaScript lint pass.

Native runtime proof uses ca9b13163ff; subsequent changes only reposition the changelog and correct the three independently re-run Node fixtures. Hosted CI is green in both fork lanes on exact final head a915fd1ed072d03f009c1049c2958b6df2dcc8b5: https://github.com/openclaw/bun/actions/runs/37255516055 (attempt 1). Formatting, JavaScript lint, and source lints are green too. The valid-cache repro also passes under a 2 GiB address-space limit and systemd MemoryDenyWriteExecute=yes; both restrictions abort the pre-fix binary. Upstream proof update: oven-sh#41769 (comment).