feat: add module prefixes to all routes and load all modules in swagger

Route structure:
  /v1/iam/auth/*         (was /v1/auth/*)
  /v1/iam/users/*        (was /v1/users/*)
  /v1/iam/roles/*        (was /v1/roles/*)
  /v1/iam/permissions/*  (was /v1/permissions/*)
  /v1/landing/cms/events/*        (was /v1/cms/landing/events/*)
  /v1/landing/cms/testimonials/*  (was /v1/cms/landing/testimonials/*)
  /v1/dimentorin/mentors/*   (was /v1/mentors/*)
  /v1/dimentorin/sessions/*  (was /v1/sessions/*)
  /v1/gacha/*            (unchanged)
  /v1/hackathon/*        (unchanged)
  /v1/qr/*               (unchanged)

Swagger: add gacha_credits endpoints which were missing from OpenAPI spec.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

imphnen-dimentorin/src/sessions/infrastructure/http/handlers/mutation_handlers.rs

@@ -16,7 +16,7 @@ use std::sync::Arc;
 
 #[utoipa::path(
     post,
-    path = "/v1/mentors/{id}/sessions/create",
+    path = "/v1/dimentorin/mentors/{id}/sessions/create",
     tag = "sessions",
     security(("Bearer" = [])),
     params(
@@ -48,7 +48,7 @@ pub async fn post_book_session(
 
 #[utoipa::path(
     put,
-    path = "/v1/sessions/update/{id}/status",
+    path = "/v1/dimentorin/sessions/update/{id}/status",
     tag = "sessions",
     security(("Bearer" = [])),
     params(
@@ -80,7 +80,7 @@ pub async fn put_update_session_status(
 
 #[utoipa::path(
     post,
-    path = "/v1/sessions/{id}/feedback/create",
+    path = "/v1/dimentorin/sessions/{id}/feedback/create",
     tag = "sessions",
     security(("Bearer" = [])),
     params(