## Description
---
1. This change introduces a userAgentRoundTripper that correctly
prepends our custom user agent to the existing User-Agent header
2. Moves sqladmin client to source.
3. Updated cloudsql tools for above support.
4. Add test cases to validate User agent.
## PR Checklist
---
> Thank you for opening a Pull Request! Before submitting your PR, there
are a
> few things you can do to make sure it goes smoothly:
- [x] Make sure you reviewed
[CONTRIBUTING.md](https://github.com/googleapis/genai-toolbox/blob/main/CONTRIBUTING.md)
- [x] Make sure to open an issue as a
[bug/issue](https://github.com/googleapis/genai-toolbox/issues/new/choose)
before writing your code! That way we can discuss the change, evaluate
designs, and agree on the general idea
- [ ] Ensure the tests and linter pass
- [ ] Code coverage does not decrease (if any source code was changed)
- [x] Appropriate docs were updated (if necessary)
- [ ] Make sure to add `!` if this involve a breaking change
🛠️ Fixes #<issue_number_goes_here>
## Description
---
This pull request introduces a new tool, `cloudsql-wait-for-operation`,
to improve the handling of long-running operations in Google Cloud SQL.
__Key Features:__
- __Asynchronous Operation Polling:__ The `cloudsql-wait-for-operation`
tool polls the Cloud SQL operations API at a specified interval until
the operation completes or fails. This is essential for managing
asynchronous tasks like instance and database creation, which can take
several minutes.
- __Configurable Retries:__ The tool includes configurable retry logic
with exponential backoff (`delay`, `maxDelay`, `multiplier`,
`maxRetries`) to handle transient network issues and make the polling
mechanism more resilient.
- __Improved User Experience:__ By waiting for operations to complete,
this tool provides a more synchronous-like experience for the user, who
can be confident that a resource is ready before the next step in a
workflow is executed.
Tested:
<img width="592" height="1118" alt="image"
src="https://github.com/user-attachments/assets/fd64d367-0fba-4d6a-a6f1-8fc642132208"
/>
## PR Checklist
---
> Thank you for opening a Pull Request! Before submitting your PR, there
are a
> few things you can do to make sure it goes smoothly:
- [X] Make sure you reviewed
[CONTRIBUTING.md](https://github.com/googleapis/genai-toolbox/blob/main/CONTRIBUTING.md)
- [X] Make sure to open an issue as a
[bug/issue](https://github.com/googleapis/langchain-google-alloydb-pg-python/issues/new/choose)
before writing your code! That way we can discuss the change, evaluate
designs, and agree on the general idea - (Internal bug)
- [x] Ensure the tests and linter pass
- [x] Code coverage does not decrease (if any source code was changed)
- [X] Appropriate docs were updated (if necessary)
- [ ] Make sure to add `!` if this involve a breaking change
🛠️ Fixes #<issue_number_goes_here>
