==Metadata component design and implementation with indexing strategy==
This is only for a first syntactic approach for intrinsic metadata with a fish for file names listed in P154 and parse content to json
===Note: ===
In a later task will be to implement semantic translation of intrinsic metadata where the translation will be stored in a higher level table with a column for each term (resembling to entity)
Also a extrinsic strategy will be added to the mix
=== design: ===
- [x] sequence chart for indexing metadata
- [x] table design to add to database
=== implementation: ===
- [x] create index metadata file with class in swh.indexer
- [x] test new indexer on mock storage
- [x] create storage functions in swh.storage to insert to table and read from table:
* content_metadata_add,
* read/get,
* content_metadata_missing
- [x] test storage
- [ ] deploy (with Revision forgeIndexer)