Document Sev-4B v0.3.0 research release and additive datasets

Add collection v2 source objects 1-1

Add collection v2 source objects 1-25

Document verified 36-entry Sev collection and SwarmTraces suites

Add collection v2 source objects 1-1

Add collection v2 source objects 1-28

Add collection v2 source objects 2-10

Add collection v2 source objects 1-1

Track collection v2 payloads with root-scoped large-file storage

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