feat: support custom CUR label aliases

[FloWuenne]

PR checklist

• This comment contains a description of changes (with reason).
• If you've fixed a bug or added code that should be tested, add tests!
• If you've added a new tool, parameter, or workflow path, update the relevant docs.
• If plugin declarations changed, update CITATIONS.md, README.md, and agent/context guidance in the same PR.
• Ensure the test suite passes (nextflow run . -profile test,docker --outdir <OUTDIR>).
• Check for unexpected warnings in debug mode (nextflow run . -profile debug,test,docker --outdir <OUTDIR>).
• README.md is updated (including new tool citations and authors/contributors).

Description

This PR expands benchmark cost enrichment so users can provide custom CUR resource label aliases instead of being limited to the built-in user_unique_run_id / user_nf_unique_run_id, user_pipeline_process, and user_task_hash names.

New feature

Add optional benchmark_aws_cur_label_map YAML config support. The mapping file declares aliases for the logical benchmark cost fields:

• run_id
• process
• task_hash

The normalizer now resolves those aliases against both supported CUR layouts:

• flattened resource_tags_<alias> columns
• map-style resource_tags entries

If no mapping file is supplied, the current default aliases still apply.

Included updates

• thread benchmark_aws_cur_label_map through config, schema, workflow, and normalize CLI
• resolve custom aliases during CUR normalization
• update scripts/build_filtered_cost_sidecar.py to honor the same run-id alias mapping
• document the new parameter and show example YAML config in README.md
• sync agent/context/design docs with the new public parameter
• add focused normalize tests covering custom flat aliases, custom map aliases, precedence, and config validation

Validation

• uv run --with typer --with pyyaml --with jinja2 --with pyarrow --with pytest --with httpx pytest -v modules/local/normalize_benchmark_jsonl/tests/test_normalize.py
• pre-commit run --all-files