Scaffold Rust workspace: warzone-protocol, server, client, mule

4 crates, all compile. 16/17 tests pass.

warzone-protocol (core crypto):
- Seed-based identity (Ed25519 + X25519 from 32-byte seed via HKDF)
- BIP39 mnemonic encode/decode (24 words)
- Fingerprint type (SHA-256 truncated, displayed as xxxx:xxxx:xxxx:xxxx)
- ChaCha20-Poly1305 AEAD encrypt/decrypt with random nonce
- HKDF-SHA256 key derivation
- Pre-key bundle generation with Ed25519 signatures
- X3DH key exchange (simplified, needs X25519 identity key in bundle)
- Double Ratchet: full implementation with DH ratchet, chain ratchet,
  out-of-order message handling via skipped keys cache
- Message format (WarzoneMessage envelope + RatchetHeader)
- Session type with ratchet state
- Storage trait definitions (PreKeyStore, SessionStore, MessageQueue)

warzone-server (axum):
- sled database (keys, messages, one-time pre-keys)
- Routes: /v1/health, /v1/keys/register, /v1/keys/{fp},
  /v1/messages/send, /v1/messages/poll/{fp}, /v1/messages/{id}/ack

warzone-client (CLI):
- `warzone init` — generate seed, show mnemonic, save to ~/.warzone/
- `warzone recover <words>` — restore from mnemonic
- `warzone info` — show fingerprint and keys
- Seed storage at ~/.warzone/identity.seed (600 perms)
- Stubs for send, recv, chat commands

warzone-mule: Phase 4 placeholder

Known issue: X3DH test fails (initiate/respond use different DH ops
due to missing X25519 identity key in bundle). Fix in next step.

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

warzone/target/debug/.fingerprint/hyper-tls-be0ab14c8b7793cf/invoked.timestamp

@@ -0,0 +1 @@
+This file has an mtime of when this was started.

warzone/target/debug/.fingerprint/hyper-tls-be0ab14c8b7793cf/lib-hyper_tls

@@ -0,0 +1 @@
+245464e4d137f7e0

warzone/target/debug/.fingerprint/hyper-tls-be0ab14c8b7793cf/lib-hyper_tls.json

@@ -0,0 +1 @@
+{"rustc":13850170861107434965,"features":"[]","declared_features":"[\"alpn\", \"vendored\"]","target":11005878871305885301,"profile":8276155916380437441,"path":5678454735151357373,"deps":[[784494742817713399,"tower_service",false,8510158970010487276],[3870702314125662939,"bytes",false,4696762725291962905],[4160778395972110362,"hyper",false,11720024341265954351],[9144560277883153344,"native_tls",false,14927089236687835220],[11976082518617474977,"hyper_util",false,13627700911059654302],[12186126227181294540,"tokio_native_tls",false,3961441370052066902],[13298363700532491723,"tokio",false,14699752842008257147],[16900715236047033623,"http_body_util",false,7746633921453758944]],"local":[{"CheckDepInfo":{"dep_info":"debug/.fingerprint/hyper-tls-be0ab14c8b7793cf/dep-lib-hyper_tls","checksum":false}}],"rustflags":[],"config":2069994364910194474,"compile_kind":0}