refactor(tests): reformat code and update dependency management

- Reorganized import statements in adapter tests for better readability
- Replaced or_insert_with(Vec::new) with or_default() in test closures
- Updated Cargo.lock with new dependency versions and checksums
- Added TLS features to tonic dependency configuration
- Included sqlx, chrono, and uuid dependencies with specific features
- Added jsonwebtoken and arc-swap as project dependencies
- Reformatted assertion statements to comply with line length limits
- Adjusted base64 import order in engine codec module
- Updated protobuf include statement formatting

svc/deploy.rs

@@ -0,0 +1,62 @@
+//! Server deployment configuration.
+//!
+//! Reads from environment variables to select adapter (local/redis/nats)
+//! and WebTransport settings.
+
+use std::env;
+
+/// Adapter + message bus configuration for multi-node scale-out.
+#[derive(Debug, Clone)]
+pub struct DeployConfig {
+    /// "local" | "redis" | "nats"
+    pub adapter_mode: String,
+    /// Redis connection URL (used when adapter_mode = "redis").
+    pub redis_url: String,
+    /// NATS connection URL (used when adapter_mode = "nats").
+    pub nats_url: String,
+    /// Unique server ID for this node.
+    pub server_id: String,
+    /// Enable WebTransport server.
+    pub webtransport_enabled: bool,
+    /// WebTransport listen port.
+    pub webtransport_port: u16,
+    /// TLS certificate path (required for WebTransport).
+    pub cert_path: String,
+    /// TLS key path (required for WebTransport).
+    pub key_path: String,
+}
+
+impl DeployConfig {
+    pub fn from_env() -> Self {
+        let server_id = env::var("IMKS_SERVER_ID").unwrap_or_else(|_| hostname());
+
+        Self {
+            adapter_mode: env::var("IMKS_ADAPTER").unwrap_or_else(|_| "local".into()),
+            redis_url: env::var("IMKS_REDIS_URL")
+                .unwrap_or_else(|_| "redis://localhost:6379".into()),
+            nats_url: env::var("IMKS_NATS_URL").unwrap_or_else(|_| "nats://localhost:4222".into()),
+            server_id,
+            webtransport_enabled: env::var("IMKS_WT_ENABLED")
+                .map(|v| v == "true" || v == "1")
+                .unwrap_or(false),
+            webtransport_port: env::var("IMKS_WT_PORT")
+                .ok()
+                .and_then(|v| v.parse().ok())
+                .unwrap_or(3001),
+            cert_path: env::var("IMKS_WT_CERT_PATH").unwrap_or_default(),
+            key_path: env::var("IMKS_WT_KEY_PATH").unwrap_or_default(),
+        }
+    }
+}
+
+impl Default for DeployConfig {
+    fn default() -> Self {
+        Self::from_env()
+    }
+}
+
+fn hostname() -> String {
+    env::var("HOSTNAME")
+        .or_else(|_| env::var("HOST"))
+        .unwrap_or_else(|_| "imks-node-1".into())
+}