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

models/message_forward.rs

@@ -0,0 +1,48 @@
+//! Message forwarding trail — maps to `message_forward` table.
+//!
+//! When a user forwards a message from one channel to another, this table
+//! records the provenance. The forwarded message is a new message with a
+//! copy of the original body, linked back via `source_message_id`.
+
+use chrono::{DateTime, Utc};
+use serde::{Deserialize, Serialize};
+use uuid::Uuid;
+
+/// A forwarded message linking the copy to the original.
+///
+/// Maps to the `message_forward` table. Records provenance when a user
+/// forwards a message from one channel to another.
+#[derive(Debug, Clone, Serialize, Deserialize, sqlx::FromRow)]
+pub struct MessageForward {
+    pub id: Uuid,
+    /// The new (forwarded) message.
+    pub message_id: Uuid,
+    /// The original message being forwarded.
+    pub source_message_id: Uuid,
+    /// The channel the original message came from.
+    pub source_channel_id: Uuid,
+    /// Who forwarded the message.
+    pub forwarded_by: Uuid,
+    pub created_at: DateTime<Utc>,
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_forward_serialize() {
+        let f = MessageForward {
+            id: Uuid::now_v7(),
+            message_id: Uuid::now_v7(),
+            source_message_id: Uuid::now_v7(),
+            source_channel_id: Uuid::now_v7(),
+            forwarded_by: Uuid::now_v7(),
+            created_at: Utc::now(),
+        };
+
+        let json = serde_json::to_value(&f).unwrap();
+        assert!(json["source_message_id"].is_string());
+        assert!(json["source_channel_id"].is_string());
+    }
+}