Unify gurobipy version across runtime and dev dependencies

[coderabbitai[bot]]

Description

There is a version mismatch for the gurobipy dependency in pyproject.toml:

• Runtime dependency (line 36): gurobipy>=11.0.3
• Dev dependency (line 198): gurobipy>=12.0.3

This mismatch can cause environment conflicts where dev tests may pass with features from version 12.0.3, but runtime environments may fail or behave unexpectedly with version 11.0.3.

Recommended Solutions

1. Option 1 (Simple): Update the runtime dependency at line 36 to gurobipy>=12.0.3 to match the dev dependency.

2. Option 2 (Alternative): Move gurobipy to [project.optional-dependencies] as a new solver group (e.g., [project.optional-dependencies.solver]), since it appears to be used as an optional Pyomo solver backend rather than a core runtime requirement. If choosing this route:

   • Remove gurobipy from runtime dependencies
   • Add it to a new optional dependency group
   • Update documentation to note the new extra installation method
   • Verify Pyomo handles optional solver backends gracefully

Context

• Original PR: #165
• Comment thread: https://github.com/TemoaProject/temoa/pull/165#discussion_r2440606786
• No direct gurobipy imports were found in the source code, suggesting it's a Pyomo solver backend dependency

Priority

Medium - Should be addressed in a follow-up PR to prevent potential runtime issues in production environments.