Initial commit: telfax - Rust Fax Server

- Modem driver (serialport) with AT command interface
- Class 1 fax protocol (T.30 session, HDLC framing)
- T.4/T.6 image codec (fax crate integration)
- Document conversion (image to fax, TIFF-F output)
- REST API (axum) for fax job management
- SQLite/InMemory job queue
- CLI interface (detect/serve/send/test)
- Integration tests passing

src/queue/job.rs

@@ -0,0 +1,43 @@
+use chrono::{DateTime, Utc};
+use serde::{Deserialize, Serialize};
+use uuid::Uuid;
+
+pub type JobId = Uuid;
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub enum JobStatus {
+    Queued,
+    Dialing,
+    Sending,
+    Completed,
+    Failed(String),
+    Cancelled,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct FaxJob {
+    pub id: JobId,
+    pub recipient: String,
+    pub document_path: String,
+    pub status: JobStatus,
+    pub pages: u32,
+    pub retries: u8,
+    pub created_at: DateTime<Utc>,
+    pub updated_at: DateTime<Utc>,
+}
+
+impl FaxJob {
+    pub fn new(recipient: String, document_path: String) -> Self {
+        let now = Utc::now();
+        Self {
+            id: Uuid::new_v4(),
+            recipient,
+            document_path,
+            status: JobStatus::Queued,
+            pages: 0,
+            retries: 0,
+            created_at: now,
+            updated_at: now,
+        }
+    }
+}