fix: global AGPL-3.0-or-later → PMPL-1.0-or-later replacement

Comprehensive replacement in all file types (SPDX headers, dual-license,
workflow checks, package metadata).

Part of global TODO cleanup (2026-03-16).

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

Author: hyperpolymath

ipv6-only/Containerfile

@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: AGPL-3.0-or-later
+# SPDX-License-Identifier: PMPL-1.0-or-later
 # IPv6-Only Tools Container
 # Based on Chainguard Wolfi for minimal attack surface
 
@@ -22,7 +22,7 @@ LABEL maintainer="IPv6-Only Project <ipv6@hyperpolymath.org>"
 LABEL description="IPv6-only networking tools written in Rust"
 LABEL org.opencontainers.image.source="https://github.com/hyperpolymath/ipv6-only"
 LABEL org.opencontainers.image.description="Comprehensive IPv6-only networking toolkit"
-LABEL org.opencontainers.image.licenses="AGPL-3.0-or-later"
+LABEL org.opencontainers.image.licenses="PMPL-1.0-or-later"
 LABEL version="0.1.0"
 
 # Install runtime dependencies

ipv6-only/Mustfile.epx

@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: AGPL-3.0-or-later
+# SPDX-License-Identifier: PMPL-1.0-or-later
 # Mustfile.epx - IPv6-Only Deployment Manifest
 # Authority-first deployment specification following must-spec
 #
@@ -16,7 +16,7 @@
 name = "ipv6-only"
 version = "0.1.0"
 tier = 2
-license = "AGPL-3.0-or-later"
+license = "PMPL-1.0-or-later"
 repository = "https://github.com/hyperpolymath/ipv6-only"
 
 # =============================================================================