v3.0.17-alpha

FLAGSAPI-1449 uplift python to 3.13 (#652)

* various files to uplift python to 3.9

* uplifted python from 3.9 to 3.13

* uplifted pyyaml to version 6.0

* FLAGSAPI-1449 uplifted flake8 to version 6.1.0

* FLAGSAPI-1449 reverted my_real_server_schema.json and removed launch.json

* FLAGSAPI-1449 ignore .vscode folder

* FLAGSAPI-1449 reverted some formatting changes

* Use gradlew directly instead of generating a new one

* Generate a new gradle wrapper in the build pipeline

* FLAGSAPI-1449 added Poetry version to README and committed .python-version file

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Co-authored-by: Sophie Somerville <sophie.somerville@nhs.net>