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>

disaster-recovery/scripts/_common.sh

@@ -0,0 +1,58 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+log_info(){ echo "[INFO]  $(date -Iseconds) $*"; }
+log_warn(){ echo "[WARN]  $(date -Iseconds) $*" >&2; }
+log_error(){ echo "[ERROR] $(date -Iseconds) $*" >&2; }
+die(){ log_error "$*"; exit 1; }
+
+need(){ command -v "$1" >/dev/null 2>&1 || die "Missing required tool: $1"; }
+
+json_escape() {
+  local s="$1"
+  s="${s//\\/\\\\}"
+  s="${s//\"/\\\"}"
+  s="${s//$'\n'/\\n}"
+  s="${s//$'\r'/\\r}"
+  s="${s//$'\t'/\\t}"
+  printf "%s" "$s"
+}
+
+b3_file() {
+  local f="$1"
+  if command -v b3sum >/dev/null 2>&1; then
+    b3sum "$f" | awk '{print $1}'
+  elif command -v blake3 >/dev/null 2>&1; then
+    blake3 "$f"
+  else
+    die "Need BLAKE3 tool: b3sum (preferred) or blake3."
+  fi
+}
+
+confirm_gate() {
+  : "${DRY_RUN:=1}"
+  : "${REQUIRE_CONFIRM:=1}"
+  : "${CONFIRM_PHRASE:=I UNDERSTAND THIS CAN OVERWRITE RECOVERY TARGETS}"
+
+  [[ "$DRY_RUN" == "0" ]] || die "DRY_RUN=$DRY_RUN (set DRY_RUN=0 to apply)."
+  if [[ "$REQUIRE_CONFIRM" == "1" ]]; then
+    echo "Type to confirm:"
+    echo "  $CONFIRM_PHRASE"
+    read -r input
+    [[ "$input" == "$CONFIRM_PHRASE" ]] || die "Confirmation phrase mismatch."
+  fi
+}
+
+resolve_run_dir() {
+  local backup_skill_dir="$1"
+  local run_dir="${2:-}"
+
+  if [[ -n "$run_dir" ]]; then
+    echo "$run_dir"
+    return 0
+  fi
+
+  local ptr="$backup_skill_dir/outputs/last_run_dir.txt"
+  [[ -f "$ptr" ]] || die "RUN_DIR not set and missing pointer: $ptr"
+  cat "$ptr"
+}