Initial commit: VaultMesh Skills collection

Collection of operational skills for VaultMesh infrastructure including:
- backup-sovereign: Backup and recovery operations
- btc-anchor: Bitcoin anchoring
- cloudflare-tunnel-manager: Cloudflare tunnel management
- container-registry: Container registry operations
- disaster-recovery: Disaster recovery procedures
- dns-sovereign: DNS management
- eth-anchor: Ethereum anchoring
- gitea-bootstrap: Gitea setup and configuration
- hetzner-bootstrap: Hetzner server provisioning
- merkle-forest: Merkle tree operations
- node-hardening: Node security hardening
- operator-bootstrap: Operator initialization
- proof-verifier: Cryptographic proof verification
- rfc3161-anchor: RFC3161 timestamping
- secrets-vault: Secrets management

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

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

backup-sovereign/checks/check_tools.sh

@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+# Check: Required tools are installed
+# Returns 0 if all tools present, 1 otherwise
+
+set -euo pipefail
+
+command -v tar &>/dev/null && \
+command -v gzip &>/dev/null && \
+command -v age &>/dev/null && \
+(command -v b3sum &>/dev/null || command -v blake3 &>/dev/null)