Remove unused workflows and update security policy

[luiz1361]

• Removed honeycomb-deployment-marker.yml, print-environment.yml, and slack-deployment-message.yml as they are no longer in use.
• Updated SECURITY.md to clarify the policy regarding security testing and vulnerability disclosure.

Summary by CodeRabbit

• Chores

  • Removed CI workflows that automated deployment markers, Slack deployment notifications, and printing environment/context during workflow runs.

• Documentation

  • Updated security policy to restrict unauthorized testing, add an explicit vulnerability disclosure channel, and note no monetary compensation.
  • Removed outdated GitHub organization documentation sections from the README.

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[coderabbitai]

Walkthrough

Removed three GitHub Actions workflows under .github/workflows, removed a README section about org-level GitHub resources, and updated SECURITY.md to require prior authorization for security testing and added a vulnerability disclosure contact and policy notes.

Changes

Cohort / File(s)	Summary
Removed CI Workflows .github/workflows/honeycomb-deployment-marker.yml, .github/workflows/print-environment.yml, .github/workflows/slack-deployment-message.yml	Deleted workflows that: created Honeycomb deploy markers using Vercel data; printed GitHub context/environment; and constructed/sent Slack deployment notifications (included optional Vercel integration and production-branch logic).
Docs / Security README.md, SECURITY.md	README.md: removed .github org-resources section. SECURITY.md: replaced prior contact guidance with a policy disallowing unauthorized testing, added disclosure email security@prisma.io, noted no monetary compensation, and added related policy notes.

Suggested reviewers

• Nova-ZA
• rtbenfield

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the main changes: removal of three unused workflow files and updates to the security policy.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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[coderabbitai]

Actionable comments posted: 1

🤖 Fix all issues with AI agents

In `@SECURITY.md`:
- Around line 3-5: Replace bare links in SECURITY.md: change the plain email
"security@prisma.io" to a mailto link with link text (e.g., [Report a
vulnerability](mailto:security@prisma.io)) and replace the bare URL
"https://trust.prisma.io/" with descriptive link text (e.g., [Prisma Trust
Center](https://trust.prisma.io/)) so both the email and the trust URL use
explicit Markdown link text and satisfy markdownlint MD034.

[coderabbitai]

Actionable comments posted: 1

🤖 Fix all issues with AI agents

In `@SECURITY.md`:
- Line 3: The long single sentence on line 3 should be split into multiple
sentences for clarity: separate the authorization requirement, the disclosure
instruction (include the security@prisma.io email), and the compensation policy
into distinct sentences; update the paragraph that currently reads "To keep our
customer data..." so it becomes three concise sentences covering (1) no security
testing without prior authorization, (2) how to report vulnerabilities via the
specified email address, and (3) that no monetary compensation is offered.