Enhancement: Enforce PRs use .github/PULL_REQUEST_TEMPLATE.md in automated flows

[atxtechbro]

Problem

Automated PR creation (local/scripts/Actions) can drift from our .github/PULL_REQUEST_TEMPLATE.md guidance and sometimes introduces formatting issues.

Proposal

• Standardize on creating PR bodies via --body-file or API payloads sourced from a rendered template
• Add helper that composes the standard sections (Summary, What Changed, Why, References, Git Statistics)
• Integrate into close-issue and auto-trigger workflows

Acceptance Criteria

• All automated PRs follow the template’s structure
• No escaped newlines; markdown renders correctly
• Documented procedure for local/manual usage

Related

• Follow-up to bug filed separately
• .github/PULL_REQUEST_TEMPLATE.md

[atxtechbro]

Example of what happened that led to this issue (see screenshot)

[atxtechbro]

Note: This issue was observed with OpenAI Codex. Haven't seen this problem with Claude Code yet - more testing needed to confirm if the template enforcement issue affects Claude Code.