Octue

Summary
Stop recurrent redelivery and costly reprocessing of questions on Google Cloud Run via Pub/Sub.

Note: Child services must be updated to this version of `octue-sdk-python` to work with parents of this version or above. Parents do not need to be updated to this version to ask questions to children updated to this version.

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Contents ([279](https://github.com/octue/octue-sdk-python/pull/279))
**IMPORTANT:** There is 1 breaking change.

Enhancements
- Make children acknowledge the delivery of questions from their parents
- **BREAKING CHANGE:** Make parents retry question delivery if initial delivery is not acknowledged

Fixes
- Prevent recurrent redelivery of Pub/Sub messages to Cloud Run services
- Use single instance of answer topic in Cloud Run to avoid potential missing messages from the child to the parent

Refactoring
- Move message pulling into `OrderedMessageHandler`
- Move `OrderedMessageHandler` into its own module

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Contents ([278](https://github.com/octue/octue-sdk-python/pull/278))

Enhancements
- Allow getting of Google Cloud credentials as a dictionary
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Summary
Stop high number of retries of publishing answers from child when the parent has timed out.

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Contents ([277](https://github.com/octue/octue-sdk-python/pull/277))

Enhancements
- Make subscription retry policy exponential and allow customisation

Fixes
- Stop deleting question topic when stopping waiting for answer

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Contents ([276](https://github.com/octue/octue-sdk-python/pull/276))

Fixes
- Retry topic existence check if it initially fails by adding timeout parameter

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Contents

Fixes
- Remove extra field from format string

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Contents

Fixes
- Ensure `MissingServiceID` error is raised when the `SERVICE_ID` environment variable is empty or missing on deployed services

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