Add organism classification service (taxonomy-priority) with diagnostics and tests

[SatoryKono]

Motivation

• Provide deterministic high-level organism classification (acellular / unicellular / multicellular) for assay records using the existing assay_taxonomy_id and assay_organism inputs.
• Ensure taxonomy ID is the source-of-truth when available and record diagnostics when assay_organism and assay_taxonomy_id disagree.
• Keep logic pure domain code (no I/O) and expose a typed, easily extensible API for downstream use in transformers/validation.

Description

• Added a new pure-domain service classify_organism(assay_organism, assay_taxonomy_id) -> OrganismClassificationResult with the OrganismClass enum and OrganismClassificationResult dataclass to capture organism_class, normalized_organism, taxonomy_id, source, source_conflict and reason (file: src/bioetl/domain/services/organism_classification_service.py).
• Implemented deterministic normalization (trim, lower-case, remove parenthetical annotations), alias mapping (hiv, eel, rice, monkey) and lightweight heuristic hints plus lookup tables for known taxonomy IDs and canonical names.
• Taxonomy ID is given priority when valid; conflicts set source_conflict=True and populate reason; unmapped-but-valid taxonomy IDs return source="unresolved" with explanation.
• Exported the new API from the services package and added focused unit tests (file: tests/unit/domain/services/test_organism_classification_service.py).
• Small ancillary fixes for formatting/imports and a few type/comment adjustments in config/system modules to satisfy repo checks (files touched: src/bioetl/domain/services/__init__.py, src/bioetl/infrastructure/config/*, src/bioetl/infrastructure/system/memory_monitor.py, src/bioetl/__init__.py, and one test formatting change).

Testing

• Ran unit tests for the new service with uv run python -m pytest tests/unit/domain/services/test_organism_classification_service.py -q and they passed. ✅
• Verified architecture/style gates with uv run python -m pytest tests/architecture/test_code_formatting.py tests/architecture/test_code_metrics.py -q and both passed after formatting fixes. ✅
• Type checking with uv run python -m mypy --strict src/bioetl/ completed with no errors. ✅
• Ran the full test suite with uv run python -m pytest tests/ -x -q; the run failed on an unrelated live e2e test due to an upstream ChEMBL API 500 Internal Server Error (tests/e2e/test_full_pipeline.py::TestChEMBLPipelineE2E::test_chembl_activity_full_run), which is external to the classification logic and not caused by this change. ⚠️

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