Update source code `Kind` to `Type`. It's only changes within our code.
Changes to yaml tag (that will affect users) will be done in later PRs.
This is a breaking change since it updates telemetry's span attribute
from `source_kind` to `source_type`.
Related #817
Future updates will include:
* Updating a preprocessing function to convert config file from v1 to v2
* Update unmarshal function for ToolsFile to convert config file (test
will fail since the yaml tag is not yet updated).
* Update yaml tag (test will pass).
## Description
---
This pull request introduces the `cloud-sql-get-instances` tool, which
enables users to retrieve detailed information about a specified Cloud
SQL instance. This tool enhances the toolbox by providing a direct and
authenticated way to interact with the Google Cloud SQL Admin API.
Authentication is handled automatically by generating a bearer token
from the environment's Application Default Credentials with the
`https://www.googleapis.com/auth/sqlservice.admin` scope.
<img width="282" height="1064" alt="image"
src="https://github.com/user-attachments/assets/253d3939-7de2-4324-bc2b-8a2eb20eb133"
/>
####
## 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 - Tracked internally
- [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>
