add sync types for firehose consumption
new enums from com.atproto.sync.subscribeRepos lexicon:
- CommitAction: create, update, delete
- EventKind: commit, sync, identity, account, info
- AccountStatus: takendown, suspended, deleted, etc.
these work with std.json automatic enum parsing, enabling
exhaustive switches instead of mem.eql string comparisons.
bumps version to 0.1.0 (new feature, backwards compatible).
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>