Restore the canonical Metanet Apps v0.1 contract

[ty-everett]

What changed

• makes the established v0.1 metadata shape the sole writable Apps contract
• removes metadata v2, publisher_name, the legacy key constant, and incident migration API
• keeps canonical protocol/key constants plus reliable broadcast and multi-host lookup behavior
• validates without rewriting domains, URLs, dates, or publisher-controlled metadata
• prepares corrective package version 1.1.1

Why

The Apps topic in @bsv/overlay-topics already defines v0.1 as canonical. The 1.1.0 GitHub release introduced a second schema and incident-specific migration API that do not belong in the protocol client.

Validation

• npm test
• npm run lint:ci

[codecov]

Codecov Report

❌ Patch coverage is 89.65517% with 3 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/metadata.ts	89.65%	3 Missing ⚠️

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