docs: assign types Support lifecycle

[abrichr]

Summary

• assign openadapt-types the Support lifecycle role as the current public schema dependency
• remove the static Alpha package classifier and Browser Beta maturity table
• describe product and workflow status through signed, expiring, and revocable admissions
• inspect the exact wheel and source distribution before test or release publication
• reject static maturity classifiers, metadata drift, missing archives, and extra archives

Verification

• 279 tests passed
• Ruff passed for changed Python files
• built wheel and source distribution passed release artifact verification
• source tree and both archives passed the public source-boundary guard

[abrichr]

Closing as part of a founder-ordered queue drain. This draft has had no change since 2026-08-20 and its authoring context (Codex) is stopped. The branch is NOT deleted, so reopening is one click if someone picks this up. Rationale: 58 open PRs across 17 repos, with 86 parallel workstreams opened in two days, made it impossible to tell live work from abandoned work.