fix(http): stop surfacing background/enrichment-fetch failures as error toasts

Two related cases where ErrorHandlerInterceptor's global toast fired even
though the calling component already recovers gracefully on its own:

- GET /kyc/risk-rules 404ing (e.g. not yet deployed on a given backend)
  popped a raw "Http failure response ... 404" toast on the Create Client
  page, even though client-general-step already falls back to an empty
  rule set and a default risk category when this call fails.

- The Clients list page fires several per-row background calls
  (client data/KYC/address, for every visible row) plus the main search —
  each already had its own catchError/error handling, but the
  interceptor's 500 branch had no silencing path at all (only 403/404 did,
  and only for a fixed set of known-optional URLs), so any backend
  hiccup there spammed "Internal Server Error" toasts on top of an
  otherwise-working page.

Added a SILENT_HTTP_ERROR HttpContextToken so a caller can opt a specific
request out of the toast for every status code (not just 403/404) when it
already handles failure itself — threaded as an optional `silent` param
through ClientsService's searchByText/getClientData/getClientKyc/
getClientAddressData (default false, so no other of their ~50+ call sites
change behavior) and set from ClientsComponent's list-page calls. The
risk-rules endpoint was simpler: just added to the interceptor's existing
URL-based silent-request list alongside client images/KYC/pending-edits.

src/app/clients/clients.service.ts

@@ -8,7 +8,8 @@
 
 /** Angular Imports */
 import { Injectable, inject } from '@angular/core';
-import { HttpClient, HttpParams, HttpBackend, HttpHeaders } from '@angular/common/http';
+import { HttpClient, HttpParams, HttpBackend, HttpHeaders, HttpContext } from '@angular/common/http';
+import { SILENT_HTTP_ERROR } from 'app/core/http/silent-error.token';
 
 /** rxjs Imports */
 import { Observable, of, throwError } from 'rxjs';
@@ -66,8 +67,11 @@ export class ClientsService {
     return this.http.get(`/clients/template?officeId=${officeId}&staffInSelectedOfficeOnly=true`);
   }
 
-  getClientData(clientId: string) {
-    return this.http.get(`/clients/${clientId}`);
+  getClientData(clientId: string, silent = false) {
+    return this.http.get(
+      `/clients/${clientId}`,
+      silent ? { context: new HttpContext().set(SILENT_HTTP_ERROR, true) } : {}
+    );
   }
 
   createClient(client: any) {
@@ -153,8 +157,11 @@ export class ClientsService {
     return this.http.get(`/clients/${clientId}/accounts`);
   }
 
-  getClientAddressData(clientId: string) {
-    return this.http.get(`/client/${clientId}/addresses`);
+  getClientAddressData(clientId: string, silent = false) {
+    return this.http.get(
+      `/client/${clientId}/addresses`,
+      silent ? { context: new HttpContext().set(SILENT_HTTP_ERROR, true) } : {}
+    );
   }
 
   getClientChargesData(clientId: string) {
@@ -698,7 +705,8 @@ export class ClientsService {
     sortAttribute: string = '',
     sortDirection: string = '',
     activeOnly: boolean = false,
-    legalFormType: string = ''
+    legalFormType: string = '',
+    silent: boolean = false
   ) {
     const innerRequest: any = { text };
     if (activeOnly) {
@@ -727,7 +735,11 @@ export class ClientsService {
         ]
       };
     }
-    return this.http.post(`/v2/clients/search`, request);
+    return this.http.post(
+      `/v2/clients/search`,
+      request,
+      silent ? { context: new HttpContext().set(SILENT_HTTP_ERROR, true) } : {}
+    );
   }
 
   /**
@@ -764,8 +776,11 @@ export class ClientsService {
    * Gets KYC details for a client.
    * @param clientId Client ID
    */
-  getClientKyc(clientId: string): Observable<any> {
-    return this.http.get(`/clients/${clientId}/kyc`);
+  getClientKyc(clientId: string, silent = false): Observable<any> {
+    return this.http.get(
+      `/clients/${clientId}/kyc`,
+      silent ? { context: new HttpContext().set(SILENT_HTTP_ERROR, true) } : {}
+    );
   }
 
   /**