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>

btc-anchor/references/btc_anchor_notes.md

@@ -0,0 +1,14 @@
+# BTC Anchor Notes
+
+## Method
+v1 anchors via OP_RETURN using the node wallet RPC flow:
+- walletcreatefundedpsbt
+- walletprocesspsbt
+- finalizepsbt
+- sendrawtransaction
+
+## Payload
+ASCII prefix (default "VM") + root bytes, truncated to standard OP_RETURN limits.
+
+## Ops
+Prefer testnet/signet during development, then mainnet with tight fee control.