refactor(db): Migrate wigs database to CesrIoSetSuber

[alecforston]

For issue #1163

Summary

Refactored wigs database from raw LMDB storage to CesrIoSetSuber, enabling type-safe storage of Siger objects instead of raw bytes.

Changes

Schema Update

# Before
self.wigs = self.env.open_db(key=b'wigs.', dupsort=True)

# After  
self.wigs = subing.CesrIoSetSuber(db=self, subkey='wigs.', klas=indexing.Siger)

Removed Helper Methods

Deleted deprecated Baser methods that are replaced by CesrIoSetSuber API:

• getWigs() → wigs.get()
• getWigsIter() → wigs.getIter()
• putWigs() → wigs.pin()
• addWig() → wigs.add()
• cntWigs() → wigs.cnt()
• delWigs() → wigs.rem()

Updated Call Sites

Migrated ~40+ usages across the codebase:

Files modified:

• src/keri/db/basing.py - Database schema and helper methods
• src/keri/core/eventing.py - Event processing and witness signature handling
• src/keri/app/agenting.py, delegating.py, grouping.py, indirecting.py - Application layer
• src/keri/app/cli/ - CLI commands
• src/keri/vdr/credentialing.py - Credential verification
• tests/ - Test updates for new API

Testing

• Updated test_basing.py to create valid Siger objects using signing keys
• All existing tests pass with new implementation

[SmithSamuelM]

Looks good

[SmithSamuelM]

Not sure why your pull request is worried about a workflow pull request

[SmithSamuelM]

Please resolve conflicts

[SmithSamuelM]

the new CeserSuber returns instances of siger not qb64 signature, therefore the convention for the return variable is to use the variable wiger for (witness siger) and not wits. So everywhere that the old code is returns to wits it should be wigers.