🚸 Do not error if a schema module of an instance isn't installed

[falexwolf]

If you don't have a schema module installed, you'll not see the metadata from its registries.

For example, in an environment that lacks findrefs:

>>> import lamindb as ln
! schema module 'findrefs' is not installed → no access to its registries (resolve via `pip install findrefs`)
→ connected lamindb: laminlabs/lamin-dev
>>> artifact = ln.Artifact.get("iw9RRhFApeJVHC1L0001")
>>> artifact.describe()
Artifact(uid='iw9RRhFApeJVHC1L0001', version='1.0', is_latest=True, description='my RNA-seq', suffix='.parquet', type='dataset', size=4091, hash='pYYPTWIvnIZ83a9_0WLNYg', _hash_type='md5', _accessor='DataFrame', visibility=1, _key_is_virtual=True, created_at=2024-09-02 14:15:10 UTC)
  Provenance
    .storage = 's3://lamin-eu-central-1/9fm7UN13'
    .transform = 'Introduction'
    .run = '2024-09-03 19:23:15 UTC'
    .created_by = 'falexwolf'

In an environment that has findrefs, you'll see the annotation with the reference:

>>> import lamindb as ln
→ connected lamindb: laminlabs/lamin-dev
>>> artifact = ln.Artifact.get("iw9RRhFApeJVHC1L0001")
>>> artifact.describe()
Artifact(uid='iw9RRhFApeJVHC1L0001', version='1.0', is_latest=True, description='my RNA-seq', suffix='.parquet', type='dataset', size=4091, hash='pYYPTWIvnIZ83a9_0WLNYg', _hash_type='md5', _accessor='DataFrame', visibility=1, _key_is_virtual=True, created_at=2024-09-02 14:15:10 UTC)
  Provenance
    .storage = 's3://lamin-eu-central-1/9fm7UN13'
    .transform = 'Introduction'
    .run = '2024-09-03 19:23:15 UTC'
    .created_by = 'falexwolf'
  Labels
    .references = 'My awesome paper'

[github-actions]

🚀 Deployed on https://6708e8202e4f8c0e63348838--lamindb-setup-htry.netlify.app

[codecov]

Codecov Report

Attention: Patch coverage is 75.00000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 83.52%. Comparing base (c4fafda) to head (06ed246).

Files with missing lines	Patch %	Lines
lamindb_setup/_init_instance.py	66.66%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #883      +/-   ##
==========================================
- Coverage   83.55%   83.52%   -0.04%     
==========================================
  Files          43       43              
  Lines        3357     3362       +5     
==========================================
+ Hits         2805     2808       +3     
- Misses        552      554       +2     

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