Oasislmf

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* Optimise FM/IL component (IL input items + input files generation)
* Optimise Oasis files generation (GUL + IL input items + input files generation)
* Upgrade data-related utilities
* Update API client
* Fixes for windows compatibility
* Support for Python 2.7 Ends

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* Hotfix for GUL files generation
* Hotfix for lookup index generation
* Hotfix for ktools bash script

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* Hotfix fix for analysis_settings custom model worker
* Hotfix tweak for deterministic RI loss calculation

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* Hotfix for path issue with the analysis_setttings file
* Downgraded ktools from `3.0.6` to `3.0.5` fix pending in fmcalc

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* Remove CSV file transformations from Oasis files generation - use OED source exposure directly
* Integrate backend RI functionality with the CLI model subcommands - full RI losses can now be generated
* Add new CLI subcommand for deterministic loss generation including direct and RI losses
* Optimise FM component (13x speedup achieved)
* Add support for custom complex models, python version of ground up losses `gulcalc.py`

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* Hotfix for Ktools, version is now 3.0.5
* Hotfix for API Client Upload timeout issue