Add bounded debugger storage inspection

[bjdodson-openai]

Description

Adds a compatibility-preserving, bounded, read-only snapshot over the existing web PersistentStore implementation.

• Leaves the on-disk key format and ordinary persistence behavior unchanged.
• Bounds hostile keys, values, retained state, and error projection.
• Adds memory, localStorage, TTL reload, and failure-recovery coverage.

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• Documentation improvement
• Performance optimization
• Test improvement
• Other (new debugger capability)

Testing

• Tests pass locally (bazel test //...)
• Added/updated tests for changes (if applicable)
• Tested on multiple platforms (iOS/Android/Web/macOS as applicable)
• Manual testing performed (describe below)

Testing Details

• Incremental branch: Focused persistence web Bazel target passed; strict TypeScript, bounded-iterator compatibility, formatting, and diff checks passed.
• Assembled debugger stack: npm test passed 436/436; the CLI production build passed.
• Focused //src/valdi_modules/src/valdi/web_renderer:test passed.
• bazel query //... passed.
• The broad Valdi suite reproduced the established 12 unrelated failures; all new debugger specs passed.

Checklist

• Code follows project style guidelines
• Documentation updated (if needed)
• No breaking changes (or documented in description)
• Commit messages follow conventional format
• No secrets, API keys, or internal URLs included

Related Issues

Relates to #154

Additional Context

Stack 6/22. Stacked on #158 (bjd/debugger-devtools-core). Review this PR as the single incremental commit 06c5b4e0 against that base; do not merge it before its parent.

[github-actions]

📊 PR Size: size/XL

Total changes: 1289 lines (3 files)

Top files changed:

• src/valdi_modules/src/valdi/persistence/web/PersistentStoreNative.ts: +664 -2
• src/valdi_modules/src/valdi/persistence/web/test/PersistentStoreNativeWebTest.ts: +523 -90
• docs/docs/stdlib-persistence.md: +10 -0

_{Size calculated as additions + deletions. Labels: XS (<10), S (<50), M (<250), L (<1000), XL (1000+)}

[github-actions]

⚠️ Bazel & CI Test Results

Test Suite	Result
valdi_web Integration Test	✅ success
Valdi Smoke Tests	✅ success
Linux: Module Tests	✅ success
Snapshot Tests	✅ success
Linux: C++ Tests	❌ failure
API Surface Check	✅ success
Linux: Build & Export	✅ success
macOS: C++ & Platform Tests	❌ failure
Test Coverage Delta	✅ success
Linux: Registry Validation	✅ success
Linux: Build Compiler	✅ success
Linux: Hotreload Smoke	✅ success

Some tests failed. Please check the workflow logs for details.

🚀 Bazel remote cache is now enabled - future builds will be faster!

_{Workflow: Valdi CI}