Correct pipe rate units from galUS to galUS/h

[jaredthomas68]

Correct pipe rate units from galUS to galUS/h

The pipe transporter specified units of galUS for the rate units of water, which was then propagated into the iron work. This PR corrects rate units from galUS to galUS/h where appropriate.

Section 1: Type of Contribution

• Feature Enhancement
  • Framework
  • New Model
  • Updated Model
  • Tools/Utilities
  • Other (please describe):
• Bug Fix
• Documentation Update
• CI Changes
• Other (please describe):

Section 2: Draft PR Checklist

• Open draft PR
• Describe the feature that will be added
• Fill out TODO list steps
• Describe requested feedback from reviewers on draft PR
• Complete Section 7: New Model Checklist (if applicable)

TODO:

• Step 1
• Step 2

Type of Reviewer Feedback Requested (on Draft PR)

Structural feedback:

Implementation feedback:

Other feedback:

Section 3: General PR Checklist

• PR description thoroughly describes the new feature, bug fix, etc.
• [-] Added tests for new functionality or bug fixes
• Tests pass (If not, and this is expected, please elaborate in the Section 6: Test Results)
• Documentation
  • [-] Docstrings are up-to-date
  • [-] Related docs/ files are up-to-date, or added when necessary
  • [-] Documentation has been rebuilt successfully
  • Examples have been updated (if applicable)
• CHANGELOG.md
  • At least one complete sentence has been provided to describe the changes made in this PR
  • After the above, a hyperlink has been provided to the PR using the following format:
    "A complete thought. [PR XYZ]((https://github.com/NatLabRockies/H2Integrate/pull/XYZ)", where
    XYZ should be replaced with the actual number.

Section 4: Related Issues

Somewhat related to #223

Section 5: Impacted Areas of the Software

Section 5.1: New Files

• None

Section 5.2: Modified Files

• examples/21_iron_examples/iron_dri/tech_config.yaml
  commodity_rate_units (technologies entries): Updated water commodity rate units from galUS to galUS/h to represent a flow rate consistently with hourly usage assumptions.

• examples/21_iron_examples/iron_mapping/tech_config.yaml
  commodity_rate_units (technologies entry): Updated water commodity rate units from galUS to galUS/h for consistency with rate-based feedstock accounting.

• h2integrate/converters/iron/iron_dri_plant.py
  HydrogenIronReductionPlantPerformanceComponent (line 69): Changed water units mapping to galUS/h so internal unit metadata matches hourly commodity rates.
  NaturalGasIronReductionPlantPerformanceComponent (line 96): Changed water units mapping to galUS/h for parity with the hydrogen pathway and downstream unit checks.

• h2integrate/converters/iron/test/test_rosner_dri.py
  ng_feedstock_availability_costs (line 50): Updated expected water units from galUS to galUS/h to match converter unit definitions.
  h2_feedstock_availability_costs (line 83): Updated expected water units from galUS to galUS/h to keep hydrogen-case assertions aligned.

• h2integrate/converters/steel/steel_eaf_plant.py
  HydrogenEAFPlantPerformanceComponent (line 66): Changed water units mapping to galUS/h to use hourly flow units.
  NaturalGasEAFPlantPerformanceComponent (line 93): Changed water units mapping to galUS/h for consistent EAF feedstock-rate treatment.

• h2integrate/converters/steel/test/test_rosner_eaf.py
  ng_feedstock_availability_costs (line 65): Updated expected water units to galUS/h so test expectations match EAF model output metadata.
  h2_feedstock_availability_costs (line 103): Updated expected water units to galUS/h for hydrogen EAF case consistency.

• h2integrate/feedstocks/test/test_feedstocks.py
  test_multiple_different_type_feedstocks (line 328): Corrected electricity units expectation from MW*h to MW to align with rate-based input conventions.
  test_multiple_different_type_feedstocks (line 334): Updated water units expectation from galUS to galUS/h to align with hourly water consumption rates.

• h2integrate/transporters/pipe.py
  PipePerformanceModel unit selection (line 41): Changed water commodity units from galUS to galUS/h.

Section 6: Additional Supporting Information

Section 7: Test Results, if applicable

Section 8 (Optional): New Model Checklist

• Model Structure:
  • Follows established naming conventions outlined in docs/developer_guide/coding_guidelines.md
  • Used attrs class to define the Config to load in attributes for the model
    • If applicable: inherit from BaseConfig or CostModelBaseConfig
  • Added: initialize() method, setup() method, compute() method
    • If applicable: inherit from CostModelBaseClass
• Integration: Model has been properly integrated into H2Integrate
  • Added to supported_models.py
  • If a new commodity_type is added, update create_financial_model in h2integrate_model.py
• Tests: Unit tests have been added for the new model
  • Pytest-style unit tests
  • Unit tests are in a "test" folder within the folder a new model was added to
  • If applicable add integration tests
• Example: If applicable, a working example demonstrating the new model has been created
  • Input file comments
  • Run file comments
  • Example has been tested and runs successfully in test_all_examples.py
• Documentation:
  • Write docstrings using the Google style
  • Model added to the main models list in docs/user_guide/model_overview.md
    • Model documentation page added to the appropriate docs/ section
    • <model_name>.md is added to the _toc.yml
  • Run generate_class_hierarchy.py to update the class hierarchy diagram in docs/developer_guide/class_structure.md

[johnjasa]

Thanks @jaredthomas68!