Create security-private-channel.md

Author: BryceWDesign

.github/ISSUE_TEMPLATE/security-private-channel.md

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+---
+name: Security (private channel requested)
+about: Request a private channel for a security-sensitive report
+title: "Security (private channel requested)"
+labels: ["security"]
+assignees: []
+---
+
+## Important
+Do **not** include exploit details, private keys, secrets, or weaponized reproduction steps in this public issue.
+
+Use this issue only to request a private reporting path.
+
+## Affected area
+High-level component only:
+- [ ] policy enforcement
+- [ ] receipt canonicalization
+- [ ] receipt signing
+- [ ] receipt verification
+- [ ] approval verification
+- [ ] chain validation
+- [ ] key handling
+- [ ] storage / log verification
+- [ ] other
+
+Notes:
+
+## Severity estimate
+- [ ] low
+- [ ] medium
+- [ ] high
+- [ ] critical
+- [ ] unsure
+
+## Private follow-up requested
+- [ ] yes
+
+## Preferred contact method
+- GitHub Security Advisory / private reporting
+- LinkedIn
+- Other approved private path
+
+If needed for routing, the maintainer’s public professional profile is:
+- `https://www.linkedin.com/in/brycewdesign/`
+
+## One-sentence summary
+Provide only a safe, high-level summary here.