Replace RSR template placeholders with actual values

Fill {{REPO}}, {{OWNER}}, {{FORGE}}, {{AUTHOR}}, {{AUTHOR_EMAIL}},
{{SECURITY_EMAIL}}, {{CURRENT_YEAR}}, and {{PROJECT_NAME}} across
CONTRIBUTING.md, CODE_OF_CONDUCT.md, SECURITY.md, issue templates,
and workflow files.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: hyperpolymath

ABI-FFI-README.md

@@ -374,7 +374,7 @@ When modifying the ABI/FFI:
 
 ## License
 
-{{LICENSE}}
+PMPL-1.0-or-later
 
 ## See Also
 

CONTRIBUTING.md

@@ -58,7 +58,7 @@ cloudguard-cli/
 
 **Before reporting**:
 1. Search existing issues
-2. Check if it's already fixed in `{{MAIN_BRANCH}}`
+2. Check if it's already fixed in `main`
 3. Determine which perimeter the bug affects
 
 **When reporting**:

PLACEHOLDERS.md

@@ -67,8 +67,8 @@ sed -i "s/2026-03-02/$(date +%Y-%m-%d)/g" $(grep -rl '2026-03-02' .)
 
 | Placeholder | Description | Example | Files |
 |---|---|---|---|
-| `{{SECURITY_EMAIL}}` | Security contact email | `security@example.org` | SECURITY.md |
-| `{{PGP_FINGERPRINT}}` | 40-char PGP fingerprint | `ABCD 1234 ...` | SECURITY.md |
+| `6759885+hyperpolymath@users.noreply.github.com` | Security contact email | `security@example.org` | SECURITY.md |
+| `[PGP fingerprint not set]` | 40-char PGP fingerprint | `ABCD 1234 ...` | SECURITY.md |
 | `{{PGP_KEY_URL}}` | URL to public PGP key | `https://keys.openpgp.org/...` | SECURITY.md |
 | `{{WEBSITE}}` | Project website | `https://example.org` | SECURITY.md |
 | `{{CONDUCT_EMAIL}}` | Conduct reports email | `conduct@example.org` | CODE_OF_CONDUCT.md |
@@ -79,13 +79,13 @@ sed -i "s/2026-03-02/$(date +%Y-%m-%d)/g" $(grep -rl '2026-03-02' .)
 
 | Placeholder | Description | Example | Files |
 |---|---|---|---|
-| `{{MAIN_BRANCH}}` | Main branch name | `main` | CONTRIBUTING.md |
+| `main` | Main branch name | `main` | CONTRIBUTING.md |
 
 ### Build
 
 | Placeholder | Description | Example | Files |
 |---|---|---|---|
-| `{{LICENSE}}` | License name | `PMPL-1.0-or-later` | ABI-FFI-README.md |
+| `PMPL-1.0-or-later` | License name | `PMPL-1.0-or-later` | ABI-FFI-README.md |
 | `{{PROJECT_PURPOSE}}` | One-line project description | `FFI bridges between languages` | STATE.a2ml |
 
 ### AI Manifest