[IND-4226] [COMPLIANCE] Update Copyright Headers

[oss-core-libraries-dashboard]

Hi there 👋

This PR was auto-generated as part of an internal review of repositories that are not in compliance with IBM's licensing standards.

Repository Information

• Repository: go-metrics
• Repository Type: non-product
• First commit year: 2013
• Latest commit year: 2025
• JIRA Ticket: IND-4226

Frequently Asked Questions

Why am I getting this PR?

This pull request was created because one or more source code files were found incorrect copyright and/or license headers.

More info is available in these documents - MEMO.

Old Hashicorp Copyright details can be viewed here - RFC.

How do you determine which files should get copyright headers?

Attempts are made to skip scanning autogenerated files (e.g., `go.mod`) and prose. If you find file types you feel should be excluded from future scans, please reach out to:

#proj-software-copyright

I have a file or folder which should be exempted, how do I do that?

You may exempt certain files or folders from being scanned by adding a `.copywrite.hcl` config in the root of your repo. You can use the [`copywrite init`](https://go.hashi.co/copywrite) command to interactively create a config for this project.

An example schema can be found below. Add a doublestar**-capable pattern to the header_ignore list to skip it in future scans.

# (OPTIONAL) Overrides the copywrite config schema version
# Default: 1
schema_version = 1

project {
  # (OPTIONAL) SPDX-compatible license identifier
  # Leave blank if you don't wish to license the project
  # Default: "MPL-2.0"
  # license = ""

  # (OPTIONAL) Represents the year that the project initially began
  # Default: <the year the repo was first created>
  # copyright_year = 0

  # (OPTIONAL) A list of globs that should not have copyright or license headers .
  # Supports doublestar glob patterns for more flexibility in defining which
  # files or folders should be ignored
  # Default: []
  header_ignore = [
    # "vendor/**",
    # "**autogen**",
  ]
}

More information about configuration options is available in [the documentation](https://github.com/hashicorp/copywrite_ibm#config-structure).

Additional FAQs are available at https://go.hashi.co/header-faq

Please approve and merge this PR in a timely manner to keep this source code compliant with our OSS license agreement. If you have any questions or feedback, reach out to #proj-software-copyright.

Thank you!

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