Page History

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1. Read - Write OCFL via Fedora API using Archival Groups
2. Versioning 
3. Fixity
   1. Persistence Fixity (on demand - return the stored value on GET) ?? not sure about this one
   2. Transmission fixity (on ingest, DIGEST header)
4. Many members performance improvement
5. Ingest performance

Nice to haves

1. (Read - Write to sql + file system (NO OCFL))
2. Messaging
3. WebAC
4. Transactions
5. Simple Search API
6. Fixity
   1. Persistence Fixity: on demand - fresh calculation and comparison with stored value (/fcr:fixity)
   2. Persistence Fixity: on demand - fresh calculation (WANT-DIGEST header)
   3. Persistence Fixity: store result of calculation on demand)

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