Add support for settings db encryption

[thespad]

---

• I have read the contributing guideline and understand that I have made the correct modifications

---

Description:

Benefits of this PR and context:

How Has This Been Tested?

Source / References:

[LinuxServer-CI]

I am a bot, here are the test results for this PR:
https://ci-tests.linuxserver.io/lspipepr/duplicati/development-v2.0.9.104_canary_2024-08-21-pkg-eed53456-dev-c3c35316b04a6d02526297f97a2aed37863c3c43-pr-82/index.html
https://ci-tests.linuxserver.io/lspipepr/duplicati/development-v2.0.9.104_canary_2024-08-21-pkg-eed53456-dev-c3c35316b04a6d02526297f97a2aed37863c3c43-pr-82/shellcheck-result.xml

Tag	Passed
amd64-development-v2.0.9.104_canary_2024-08-21-pkg-eed53456-dev-c3c35316b04a6d02526297f97a2aed37863c3c43-pr-82	✅
arm64v8-development-v2.0.9.104_canary_2024-08-21-pkg-eed53456-dev-c3c35316b04a6d02526297f97a2aed37863c3c43-pr-82	✅

[LinuxServer-CI]

I am a bot, here are the test results for this PR:
https://ci-tests.linuxserver.io/lspipepr/duplicati/development-v2.0.9.104_canary_2024-08-21-pkg-eed53456-dev-ec38b6a87e2725f7c9f03774749349d11240910a-pr-82/index.html
https://ci-tests.linuxserver.io/lspipepr/duplicati/development-v2.0.9.104_canary_2024-08-21-pkg-eed53456-dev-ec38b6a87e2725f7c9f03774749349d11240910a-pr-82/shellcheck-result.xml

Tag	Passed
amd64-development-v2.0.9.104_canary_2024-08-21-pkg-eed53456-dev-ec38b6a87e2725f7c9f03774749349d11240910a-pr-82	✅
arm64v8-development-v2.0.9.104_canary_2024-08-21-pkg-eed53456-dev-ec38b6a87e2725f7c9f03774749349d11240910a-pr-82	✅

[LinuxServer-CI]

I am a bot, here are the test results for this PR:
https://ci-tests.linuxserver.io/lspipepr/duplicati/development-v2.0.9.105_canary_2024-08-29-pkg-41969b86-dev-91c3f64eee588f21fb0b0b426a6782a602b335ff-pr-82/index.html
https://ci-tests.linuxserver.io/lspipepr/duplicati/development-v2.0.9.105_canary_2024-08-29-pkg-41969b86-dev-91c3f64eee588f21fb0b0b426a6782a602b335ff-pr-82/shellcheck-result.xml

Tag	Passed
amd64-development-v2.0.9.105_canary_2024-08-29-pkg-41969b86-dev-91c3f64eee588f21fb0b0b426a6782a602b335ff-pr-82	✅
arm64v8-development-v2.0.9.105_canary_2024-08-29-pkg-41969b86-dev-91c3f64eee588f21fb0b0b426a6782a602b335ff-pr-82	✅

[LinuxServer-CI]

I am a bot, here are the test results for this PR:
https://ci-tests.linuxserver.io/lspipepr/duplicati/development-v2.0.9.105_canary_2024-08-29-pkg-41969b86-dev-d760d4a9037668b3bdca165559ab942e83831929-pr-82/index.html
https://ci-tests.linuxserver.io/lspipepr/duplicati/development-v2.0.9.105_canary_2024-08-29-pkg-41969b86-dev-d760d4a9037668b3bdca165559ab942e83831929-pr-82/shellcheck-result.xml

Tag	Passed
amd64-development-v2.0.9.105_canary_2024-08-29-pkg-41969b86-dev-d760d4a9037668b3bdca165559ab942e83831929-pr-82	✅
arm64v8-development-v2.0.9.105_canary_2024-08-29-pkg-41969b86-dev-d760d4a9037668b3bdca165559ab942e83831929-pr-82	✅

[LinuxServer-CI]

I am a bot, here are the test results for this PR:
https://ci-tests.linuxserver.io/lspipepr/duplicati/development-v2.0.9.105_canary_2024-08-29-pkg-41969b86-dev-311fbb991e6b26170112391767f17ef4c5a913c7-pr-82/index.html
https://ci-tests.linuxserver.io/lspipepr/duplicati/development-v2.0.9.105_canary_2024-08-29-pkg-41969b86-dev-311fbb991e6b26170112391767f17ef4c5a913c7-pr-82/shellcheck-result.xml

Tag	Passed
amd64-development-v2.0.9.105_canary_2024-08-29-pkg-41969b86-dev-311fbb991e6b26170112391767f17ef4c5a913c7-pr-82	✅
arm64v8-development-v2.0.9.105_canary_2024-08-29-pkg-41969b86-dev-311fbb991e6b26170112391767f17ef4c5a913c7-pr-82	✅