maint: migrate data sources to tflog structured logging

[feyzsari]

---

Before the change?

data_source_github_actions_organization_registration_token, data_source_github_actions_registration_token,
and data_source_github_branch used the standard log package with log.Printf("[DEBUG] ..."),
embedding values directly in the message string.

After the change?

Replaced log imports with github.com/hashicorp/terraform-plugin-log/tflog.
Log calls now use tflog.Debug(ctx, "...", map[string]any{...}) with structured fields,
providing proper integration with Terraform's logging system (TF_LOG, TF_LOG_PROVIDER)
and enabling field-based log filtering.

Pull request checklist

• Schema migrations have been created if needed (example)
• Tests for the changes have been added (for bug fixes / features)
• Docs have been reviewed and added / updated if needed (for bug fixes / features)

Does this introduce a breaking change?

Please see our docs on breaking changes to help!

• Yes
• No

---

[github-actions]

👋 Hi! Thank you for this contribution! Just to let you know, our GitHub SDK team does a round of issue and PR reviews twice a week, every Monday and Friday! We have a process in place for prioritizing and responding to your input. Because you are a part of this community please feel free to comment, add to, or pick up any issues/PRs that are labeled with Status: Up for grabs. You & others like you are the reason all of this works! So thank you & happy coding! 🚀

[deiga]

Sweet! Thanks!🙏

[deiga]

Please remove the resolves comment, since it adresses the issue only partly. And "resolves" will close the issue

[deiga]

Would you be available to rebase this (possibly multiple times) during the next week? We're going to release 6.13.0 and will try to land some of these open PRs

[Copilot]

Pull request overview

This PR migrates several GitHub data sources from the standard library log.Printf debug logging to Terraform’s structured logging via tflog, improving integration with TF_LOG / TF_LOG_PROVIDER and enabling field-based filtering.

Changes:

• Replaced log.Printf("[DEBUG] ...") calls with tflog.Debug(ctx, "...", map[string]any{...}) in multiple data sources.
• Removed log imports and introduced terraform-plugin-log/tflog imports (where needed) to support structured logging fields.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
github/data_source_github_branch.go	Switches “missing branch” debug logging to tflog.Debug with structured fields.
github/data_source_github_actions_registration_token.go	Switches “creating repo registration token” debug logging to structured tflog.Debug.
github/data_source_github_actions_organization_registration_token.go	Switches “creating org registration token” debug logging to structured tflog.Debug.

Comments suppressed due to low confidence (1)

github/data_source_github_branch.go:11

• tflog.Debug is used in this file but tflog is not imported, which will cause a compile error. Add the github.com/hashicorp/terraform-plugin-log/tflog import (and keep import ordering/gofmt).

import (
	"context"
	"errors"
	"net/http"

	"github.com/google/go-github/v85/github"
	"github.com/hashicorp/terraform-plugin-sdk/v2/diag"
	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
)