feat(fax): add fax routing, job tracking, inbox management, and T.38/UDPTL media support

rust/crates/proxy-engine/src/config.rs

@@ -105,6 +105,8 @@ pub struct RouteAction {
     pub ring_browsers: Option<bool>,
     #[serde(rename = "voicemailBox")]
     pub voicemail_box: Option<String>,
+    #[serde(rename = "faxBox")]
+    pub fax_box: Option<String>,
     #[serde(rename = "ivrMenuId")]
     pub ivr_menu_id: Option<String>,
     #[serde(rename = "noAnswerTimeout")]
@@ -161,6 +163,8 @@ pub struct AppConfig {
     pub devices: Vec<DeviceConfig>,
     pub routing: RoutingConfig,
     #[serde(default)]
+    pub faxboxes: Vec<FaxBoxConfig>,
+    #[serde(default)]
     pub voiceboxes: Vec<VoiceboxConfig>,
     #[serde(default)]
     pub ivr: Option<IvrConfig>,
@@ -191,6 +195,16 @@ pub struct VoiceboxConfig {
     pub max_recording_sec: Option<u32>,
 }
 
+#[allow(dead_code)]
+#[derive(Debug, Clone, Deserialize)]
+pub struct FaxBoxConfig {
+    pub id: String,
+    #[serde(default)]
+    pub enabled: bool,
+    #[serde(rename = "maxMessages")]
+    pub max_messages: Option<u32>,
+}
+
 // ---------------------------------------------------------------------------
 // IVR config
 // ---------------------------------------------------------------------------
@@ -415,6 +429,7 @@ pub struct InboundRouteResult {
     pub ring_all_devices: bool,
     pub ring_browsers: bool,
     pub voicemail_box: Option<String>,
+    pub fax_box: Option<String>,
     pub ivr_menu_id: Option<String>,
     pub no_answer_timeout: Option<u32>,
 }
@@ -525,6 +540,7 @@ impl AppConfig {
                 ring_all_devices: explicit_targets.is_none(),
                 ring_browsers: route.action.ring_browsers.unwrap_or(false),
                 voicemail_box: route.action.voicemail_box.clone(),
+                fax_box: route.action.fax_box.clone(),
                 ivr_menu_id: route.action.ivr_menu_id.clone(),
                 no_answer_timeout: route.action.no_answer_timeout,
             });
@@ -574,6 +590,7 @@ mod tests {
                 extension: "100".to_string(),
             }],
             routing: RoutingConfig { routes },
+            faxboxes: vec![],
             voiceboxes: vec![],
             ivr: None,
         }
@@ -620,6 +637,7 @@ mod tests {
                     targets: Some(vec!["desk".to_string()]),
                     ring_browsers: Some(true),
                     voicemail_box: None,
+                    fax_box: None,
                     ivr_menu_id: None,
                     no_answer_timeout: None,
                     provider: None,
@@ -644,6 +662,7 @@ mod tests {
                     targets: None,
                     ring_browsers: Some(false),
                     voicemail_box: Some("support-box".to_string()),
+                    fax_box: None,
                     ivr_menu_id: None,
                     no_answer_timeout: Some(20),
                     provider: None,