Adopt ecosystem qualification and collaboration standards #41

Tracks ml4t/ecosystem#1.

Confirmed deviations

• pypi.prerelease-install: Requires-Python '<3.15,>=3.12' blocks Python 3.15 beta
• repository.file.SECURITY.md: Required file SECURITY.md is missing
• repository.file..github/ISSUE_TEMPLATE/bug.yml: Required file .github/ISSUE_TEMPLATE/bug.yml is missing
• repository.file..github/ISSUE_TEMPLATE/feature.yml: Required file .github/ISSUE_TEMPLATE/feature.yml is missing
• repository.file..github/ISSUE_TEMPLATE/documentation.yml: Required file .github/ISSUE_TEMPLATE/documentation.yml is missing
• repository.file..github/ISSUE_TEMPLATE/config.yml: Required file .github/ISSUE_TEMPLATE/config.yml is missing
• repository.file..github/PULL_REQUEST_TEMPLATE.md: Required file .github/PULL_REQUEST_TEMPLATE.md is missing
• repository.file..github/workflows/ecosystem.yml: Required file .github/workflows/ecosystem.yml is missing
• workflow.central-qualification: Repository calls the central qualification workflow
• release.central-qualification: Release workflow depends on central qualification

Required outcome

• Add the standard issue forms, pull-request template, security policy, and ecosystem workflow.
• Make the release workflow depend on central qualification.
• Resolve every package metadata and MkDocs deviation listed above.
• Pass repository quality gates and the shared qualification matrix.
• Publish and verify a patch release when published metadata changes.

Acceptance

The default branch passes uv run ml4t-ecosystem collect for this library, central CI is green, and any required published artifact and documentation route are verified.