fix(parser): read fields inside Admonition blocks

[chhoumann]

Summary

Restore MetaEdit's established support for Dataview inline fields inside Admonition ad-* fenced blocks. Ordinary fenced code blocks remain excluded so code examples are not exposed as metadata.

Changes

• Preserve each opening fence's info string and classify ad-* fences as readable metadata containers.
• Preserve ordinary code fences nested inside Admonitions as hidden code examples.
• Apply the classification through the shared parser walk, keeping reads, updates, and inline-field insertion consistent.
• Add parser, controller, insertion, and live public-API regressions based on the issue sample.

Testing / validation

• pnpm run lint
• pnpm run build
• pnpm run test - 359 tests passed
• Live Obsidian E2E regression passed in the isolated metaedit-metaedit vault on Obsidian 1.13.0 (installer 1.12.7): Admonition fields were read, Id was updated and read back, top-level and nested js fences remained hidden and unchanged, and dev:errors was empty.
• Two complete E2E runs encountered unrelated, non-deterministic modal-harness timeouts in existing tests. The new regression passed independently, and every affected existing test file passed when rerun independently.

Release / migration impact

Patch-level bug fix. No settings, stored-data, or public API shape migration is required. No visible UI change, so screenshots are not applicable.

Checklist

• PR title follows Conventional Commits - it becomes the squash-merge commit and drives the released version.
• Linked the related issue.
• Noted release and migration impact.

Fixes #188

[chatgpt-codex-connector]

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