Expose delay fitting options in CLI config classes

[ltorres6]

Problem

Delay fitting is implemented in the library layer but not exposed through the CLI configuration system:

• DCE: fit_model() in osipy/dce/fitting.py accepts fit_delay (bool) and uses _DelayAwareModel with default bounds (0.0, 60.0), but DCEFittingConfig has no corresponding fields.
• DSC: Delay maps are computed and exported (osipy/dsc/parameters/maps.py), but there is no config to control delay-related behavior.

Users cannot enable or configure delay fitting through YAML config files or the CLI.

Proposal

Add the missing delay-related fields to the Pydantic config classes:

• DCEFittingConfig: add fit_delay: bool = False and delay_bounds: tuple[float, float] = (0.0, 60.0)
• Wire these fields through the runner (osipy/cli/runner.py) so they are passed to fit_model()
• Add equivalent fields to DSC config if applicable

Affected code

• osipy/cli/config.py — DCEFittingConfig, DSCPipelineYAML
• osipy/cli/runner.py — where config values are passed to fitting functions

🤖 Generated with Claude Code

[ayushk687]

@ltorres6 please assign this issue me

[Devguru-codes]

Hello @ltorres6 sir, I have seen pr #132 . The pr is an ai generated one with no human checks. Now, seeing that I have told @ayushk687 to dont use ai without reviews. So, seeing that I am currently working on this issue. Thank you.