Update web-vault and crates (#7121)

- Updated web-vault to v2026.3.1
  Added a new endpoint needed for the admin console to work
- Updated all crates including webpki CVE fixes - Closes #7115
- Updated GHA

Signed-off-by: BlackDex <black.dex@gmail.com>

src/api/core/organizations.rs

@@ -101,6 +101,7 @@ pub fn routes() -> Vec<Route> {
         get_billing_metadata,
         get_billing_warnings,
         get_auto_enroll_status,
+        get_self_host_billing_metadata,
     ]
 }
 
@@ -2213,6 +2214,15 @@ fn get_billing_warnings(_org_id: OrganizationId, _headers: OrgMemberHeaders) ->
     }))
 }
 
+#[get("/organizations/<_org_id>/billing/vnext/self-host/metadata")]
+fn get_self_host_billing_metadata(_org_id: OrganizationId, _headers: OrgMemberHeaders) -> Json<Value> {
+    // Prevent a 404 error, which also causes Javascript errors.
+    Json(json!({
+        "isOnSecretsManagerStandalone": false, // Secrets Manager is not supported by Vaultwarden
+        "organizationOccupiedSeats": 0 // Vaultwarden does not count seats
+    }))
+}
+
 fn _empty_data_json() -> Value {
     json!({
         "object": "list",