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>

proof-verifier/scripts/00_preflight.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+set -euo pipefail
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+source "$SCRIPT_DIR/_common.sh"
+
+: "${MERKLE_RUN_DIR:=}"
+: "${RFC3161_DIR:=}"
+: "${ETH_RUN_DIR:=}"
+: "${ETH_RPC_URL:=}"
+: "${BTC_RUN_DIR:=}"
+: "${BTC_NETWORK:=testnet}"
+
+main() {
+  [[ -n "$MERKLE_RUN_DIR" ]] || { log_error "MERKLE_RUN_DIR is required"; exit 1; }
+  [[ -d "$MERKLE_RUN_DIR" ]] || { log_error "MERKLE_RUN_DIR not found: $MERKLE_RUN_DIR"; exit 1; }
+  [[ -f "$MERKLE_RUN_DIR/ROOT.txt" ]] || { log_error "Missing ROOT.txt in $MERKLE_RUN_DIR"; exit 1; }
+
+  # tools (soft requirements)
+  need jq || true
+  need openssl || true
+  need cast || true
+  need bitcoin-cli || true
+
+  log_info "Preflight OK (soft dependencies may be missing; checks will be skipped accordingly)."
+}
+main "$@"