feat: regenerate google-cloud-monitoring

[jskeet]

This PR regenerates the google-cloud-monitoring package after fixing its OwlBot configuration to point to the correct path in googleapis-gen.

Highlights

• Updated .OwlBot.yaml to use the new source path google-monitoring-nodejs and staging destination google-monitoring.
• Regenerated the client library using OwlBot.
• Protos updated with reserved fields.
• Applied formatting updates across all TS files.
• Note on README.md / webpack.config.js changes: A template fallback occurred during post-processing due to the staging path mismatch (see details below).

Detailed Rationale for Changes

Why was the OwlBot configuration updated?

The source path in googleapis-gen for this library was changed from google-cloud-monitoring-nodejs to google-monitoring-nodejs. The old path no longer exists, causing OwlBot generation to fail. The configuration was updated to match:

• Source: /google/monitoring/google-monitoring-nodejs
• Destination: /owl-bot-staging/google-monitoring

Why did the README.md release level revert to preview and links change to google-monitoring?

Because the staging destination in .OwlBot.yaml was changed to /owl-bot-staging/google-monitoring (which does not match the actual package directory packages/google-cloud-monitoring), the OwlBot post-processor was unable to locate the existing package metadata (.repo-metadata.json) during template generation.

As a result, the template generator fell back to default settings:

1. Reverted the release level from stable to preview.
2. Changed the header to "Cloud Monitoring API: Nodejs Client" (default pretty name instead of "Stackdriver Monitoring").
3. Generated incorrect URLs pointing to packages/google-monitoring instead of packages/google-cloud-monitoring:

-[client-docs]: https://cloud.google.com/nodejs/docs/reference/monitoring/latest
-[product-docs]: https://cloud.google.com/monitoring/docs
+[homepage_samples]: https://github.com/googleapis/google-cloud-node/blob/main/packages/google-monitoring/samples
+[homepage_changelog]: https://github.com/googleapis/google-cloud-node/blob/main/packages/google-monitoring/CHANGELOG.md
+[homepage]: https://github.com/googleapis/google-cloud-node/blob/main/packages/google-monitoring

4. Reverted the copyright year in webpack.config.js to 2021:

-// Copyright 2026 Google LLC
+// Copyright 2021 Google LLC

Note: As noted by reviewers, fixing this internal misconfiguration is out of scope for this PR.

What formatting changes were applied?

The TypeScript generator or prettier configuration resulted in minor formatting changes across all generated client and test files. Example of formatting changes:

-import type {Callback, CallOptions, Descriptors, ClientOptions, PaginationCallback, GaxCall} from 'google-gax';
+import type {
+  Callback,
+  CallOptions,
+  Descriptors,
+  ClientOptions,
+  PaginationCallback,
+  GaxCall,
+} from 'google-gax';

-  private _defaults: {[method: string]: gax.CallSettings};
+  private _defaults: { [method: string]: gax.CallSettings };

User-facing Changes

None. The changes consist of formatting updates, proto updates (reserved fields), and documentation template fallbacks. The API surface remains functionally identical.

[jskeet]

This is another case (that I'd missed before) where the OwlBot configuration refers to a non-existent path in googleapis-gen.

The first commit fixes the config, the second runs OwlBot locally.

[gemini-code-assist]

Code Review

This pull request updates the google-cloud-monitoring package, transitioning its status from stable to preview, renaming references from "Stackdriver Monitoring" to "Cloud Monitoring API", and applying extensive code formatting updates across several TypeScript files. Additionally, the protobuf definitions are updated with reserved fields. A critical issue was identified in .OwlBot.yaml where the destination path in deep-copy-regex was incorrectly changed to /owl-bot-staging/google-monitoring instead of /owl-bot-staging/google-cloud-monitoring, which leads to broken links in the auto-generated README.md.

[feywind]

tbh I think this is a misconfiguration on the internal side that put stuff in the wrong place, but it's out of scope for this PR to fix it.

[feywind]

I feel pretty good about most of these changes, because it looks like mostly formatting stuff. There are a couple that may need some looking at, though, like the README changes. Those might be some kind of template fail.

[feywind]

It looks like the "open in cloud shell" links are missing now, and I'm guessing that wasn't on purpose?

[feywind]

I'm guessing these are also still supposed to be here, unless the links are just wrong.

[feywind]

I'm not sure I've ever seen begin-after-commit-hash so I just want to make sure this one was on purpose.

[suztomo]

OwlBot runs the generation for all Git commit in googleapis-gen, not just the latest. Librarian runs the generation for the commit listed in the librarian.yaml. Therefore this is not a problem for Librarian.

[suztomo]

I enriched the pull request description.