feat(routing): require explicit inbound DID routes and normalize SIP identities for provider-based number matching

ts/config.ts

@@ -62,7 +62,10 @@ export interface ISipRouteMatch {
   direction: 'inbound' | 'outbound';
 
   /**
-   * Match the dialed/called number (To/Request-URI for inbound DID, dialed digits for outbound).
+   * Match the normalized called number.
+   *
+   * Inbound: matches the provider-delivered DID / Request-URI user part.
+   * Outbound: matches the normalized dialed digits.
    * Supports: exact string, prefix with trailing '*' (e.g. "+4930*"), or regex ("/^\\+49/").
    */
   numberPattern?: string;
@@ -89,13 +92,13 @@ export interface ISipRouteAction {
 
   // --- Inbound actions (IVR / voicemail) ---
 
-  /** Route directly to a voicemail box (skip ringing devices). */
+  /** Voicemail fallback for matched inbound routes. */
   voicemailBox?: string;
 
   /** Route to an IVR menu by menu ID (skip ringing devices). */
   ivrMenuId?: string;
 
-  /** Override no-answer timeout (seconds) before routing to voicemail. */
+  /** Reserved for future no-answer handling. */
   noAnswerTimeout?: number;
 
   // --- Outbound actions (provider selection) ---