Hoist Gandalf logs and clean up common logs

[tokebe]

• Removed/merged some logs, reduced others INFO -> DEBUG
• BaseQuery now merges logs produced by query implementation, wrapped between debug-level <Begin backend-produced logs> and <End of backend logs>
• Gandalf query now returns Gandalf-produced logs

[codecov]

Codecov Report

❌ Patch coverage is 11.11111% with 8 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/retriever/data_tiers/tier_0/base_query.py	0.00%	4 Missing ⚠️
src/retriever/lookup/utils.py	0.00%	4 Missing ⚠️

Files with missing lines	Coverage Δ
src/retriever/data_tiers/tier_0/gandalf/query.py	71.42% <ø> (ø)
src/retriever/lookup/lookup.py	25.53% <ø> (+0.13%)	⬆️
src/retriever/lookup/qgx.py	20.82% <ø> (+0.05%)	⬆️
src/retriever/types/general.py	100.00% <100.00%> (ø)
src/retriever/data_tiers/tier_0/base_query.py	30.76% <0.00%> (-1.89%)	⬇️
src/retriever/lookup/utils.py	45.97% <0.00%> (+2.02%)	⬆️

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