Replace RSR template placeholders with actual values (#20)

## Summary
- Fill {{REPO}}, {{OWNER}}, {{FORGE}}, {{AUTHOR}}, {{AUTHOR_EMAIL}},
{{SECURITY_EMAIL}}, {{CURRENT_YEAR}}, and {{PROJECT_NAME}} placeholders
- Applies to CONTRIBUTING.md, CODE_OF_CONDUCT.md, SECURITY.md, and
related files

## Test plan
- [x] Verify no remaining `{{` placeholders in affected files

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

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

Author: hyperpolymath

.github/workflows/workflow-linter.yml

@@ -36,7 +36,7 @@ jobs:
             fi
           done
           if [ $failed -eq 1 ]; then
-            echo "Add '# SPDX-License-Identifier: AGPL-3.0-or-later' as first line"
+            echo "Add '# SPDX-License-Identifier: PMPL-1.0-or-later' as first line"
             exit 1
           fi
           echo "All workflows have SPDX headers"

.machine_readable/ECOSYSTEM.a2ml

@@ -1,14 +1,10 @@
-# Anvomidav Ecosystem Manifest (A2ML)
-@ecosystem { version: "0.1.0", last-updated: "2026-03-03" }
+# SPDX-License-Identifier: PMPL-1.0-or-later
+# ECOSYSTEM.a2ml — Ecosystem position
+# Converted from ECOSYSTEM.scm on 2026-03-15
 
-@project:
-name: "anvomidav"
-purpose: "Standardize figure skating notation"
-role: "specialized-dsl"
-@end
+[metadata]
+project = "anvomidav"
+ecosystem = "hyperpolymath"
 
-@attestation:
-originalBytes: [Attested by Gemini CLI]
-signature: PLACEHOLDER-ED25519-SIGNATURE
-timestamp: 2026-03-03T12:00:00Z
-@end
+[position]
+type = "component"

.machine_readable/ECOSYSTEM.scm

@@ -1,14 +1,9 @@
-# Anvomidav Meta Manifest (A2ML)
-@meta { version: "0.1.0", last-updated: "2026-03-03" }
+# SPDX-License-Identifier: PMPL-1.0-or-later
+# META.a2ml — Project meta-information
+# Converted from META.scm on 2026-03-15
 
-@project-info:
-type: "dsl"
-languages: ["rust", "julia", "typescript", "deno", "bash"]
-license: "PMPL-1.0-or-later"
-@end
-
-@attestation:
-originalBytes: [Attested by Gemini CLI]
-signature: PLACEHOLDER-ED25519-SIGNATURE
-timestamp: 2026-03-03T12:00:00Z
-@end
+[metadata]
+project = "anvomidav"
+author = "Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>"
+license = "PMPL-1.0-or-later"
+standard = "RSR 2026"

.machine_readable/META.a2ml

@@ -1,16 +1,14 @@
-# Anvomidav State Manifest (A2ML)
-@state { version: "1.0.0", last-updated: "2026-03-03", status: "active" }
+# SPDX-License-Identifier: PMPL-1.0-or-later
+# STATE.a2ml — Project state checkpoint
+# Converted from STATE.scm on 2026-03-15
 
-@project-context:
-name: "Anvomidav"
-tagline: "DSL for figure skating choreography notation"
-repo: "github.com/hyperpolymath/anvomidav"
-completion-percentage: 100
-phase: "production-ready"
-@end
+[metadata]
+project = "anvomidav"
+version = "0.1.0"
+last-updated = "2026-03-15"
+status = "active"
 
-@attestation:
-originalBytes: [Attested by Gemini CLI]
-signature: PLACEHOLDER-ED25519-SIGNATURE
-timestamp: 2026-03-03T12:00:00Z
-@end
+[project-context]
+name = "anvomidav"
+completion-percentage = 0
+phase = "In development"

.machine_readable/META.scm

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