feat: Migrate to GliNER v2

[rmitsch]

Description

Migrates to GLiNER v2.

Related Issues

• Resolves Migrate to GliNer v2 #198

Changes Made

• Migrates to GliNER v2.
• Adjusts task supports w.r.t. GliNER v2 capabilities.
• Fixes NER indexing for mentions without context.
• Fixes bug in DSPy optimization.

Checklist

• [ ] Tests have been extended to cover changes in functionality
• Existing and new tests succeed
• Documentation updated (if applicable)
• Related issues linked

Screenshots/Examples (if applicable)

[codecov]

Codecov Report

❌ Patch coverage is 93.00000% with 14 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
sieves/tasks/predictive/bridges.py	88.15%	9 Missing ⚠️
sieves/engines/gliner_.py	94.11%	2 Missing ⚠️
...es/tasks/predictive/information_extraction/core.py	88.88%	2 Missing ⚠️
sieves/tasks/predictive/core.py	80.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #202      +/-   ##
==========================================
- Coverage   92.75%   92.63%   -0.13%     
==========================================
  Files          63       63              
  Lines        3340     3339       -1     
==========================================
- Hits         3098     3093       -5     
- Misses        242      246       +4     

Files with missing lines	Coverage Δ
sieves/engines/__init__.py	100.00% <ø> (ø)
sieves/engines/engine_type.py	94.73% <100.00%> (ø)
sieves/engines/utils.py	92.00% <100.00%> (ø)
sieves/pipeline/core.py	92.62% <100.00%> (+0.12%)	⬆️
sieves/serialization.py	98.85% <ø> (ø)
sieves/tasks/__init__.py	100.00% <100.00%> (ø)
sieves/tasks/optimization/core.py	92.85% <100.00%> (ø)
sieves/tasks/predictive/classification/core.py	94.82% <100.00%> (+0.02%)	⬆️
sieves/tasks/predictive/ner/__init__.py	100.00% <100.00%> (ø)
sieves/tasks/predictive/ner/bridges.py	94.82% <100.00%> (+1.22%)	⬆️
... and 11 more

... and 2 files with indirect coverage changes

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