feat(gateway): сервис pcp-gateway-service + сворачивание маршрутизации фронта на него

- новый Spring Cloud Gateway (WebFlux): доменные маршруты /api/pcp-<x>/**
  со StripPrefix=2, /api/stations без среза пути, catch-all /api/** → ui-service;
  опциональная JWT-валидация на edge (gateway.security.jwt-enabled, по умолчанию off)
- config-repo: pcp-gateway-service.yaml (маршруты) + порт/адрес gateway в реестрах
  application-{local,docker-local,dev}
- build: репозитории переведены на mavenCentral (nstart-proxy закомментирован),
  включены mavenLocal/gradlePluginPortal; settings: include модуля
- pcp-tgu-ui-service: vite-proxy и nginx.conf свёрнуты на единый /api → gateway
  (вместо набора per-service правил)
- deploy: сервис gateway в docker-compose; helm-чарт pcp-gateway-service
- CI: .gitlab/ci/pcp-gateway-service.yml + проводка в .gitlab-ci.yml

.gitlab-ci.yml

@@ -20,6 +20,7 @@ workflow:
         - services/pcp-tgu-service/**/*
         - services/pcp-tgu-ui-service/**/*
         - services/pcp-dynamic-plan-service/**/*
+        - services/pcp-gateway-service/**/*
         - libs/pcp-types-lib/**/*
         - libs/ballistics-lib/**/*
         - build.gradle.kts
@@ -43,6 +44,7 @@ workflow:
         - helm/pcp-tgu-service/**/*
         - helm/pcp-tgu-ui-service/**/*
         - helm/pcp-dynamic-plan-service/**/*
+        - helm/pcp-gateway-service/**/*
     - if: '$CI_PIPELINE_SOURCE == "push"'
       changes:
         - .gitlab-ci.yml
@@ -64,6 +66,7 @@ workflow:
         - services/pcp-tgu-service/**/*
         - services/pcp-tgu-ui-service/**/*
         - services/pcp-dynamic-plan-service/**/*
+        - services/pcp-gateway-service/**/*
         - libs/pcp-types-lib/**/*
         - libs/ballistics-lib/**/*
         - build.gradle.kts
@@ -87,6 +90,7 @@ workflow:
         - helm/pcp-tgu-service/**/*
         - helm/pcp-tgu-ui-service/**/*
         - helm/pcp-dynamic-plan-service/**/*
+        - helm/pcp-gateway-service/**/*
     - if: '$CI_PIPELINE_SOURCE == "push" && $CI_COMMIT_BRANCH == "master"'
       changes:
         - services/pcp-ballistics-service/**/*
@@ -104,6 +108,7 @@ workflow:
         - services/pcp-tgu-service/**/*
         - services/pcp-tgu-ui-service/**/*
         - services/pcp-dynamic-plan-service/**/*
+        - services/pcp-gateway-service/**/*
         - libs/pcp-types-lib/**/*
         - libs/ballistics-lib/**/*
         - build.gradle.kts
@@ -127,6 +132,7 @@ workflow:
         - helm/pcp-tgu-service/**/*
         - helm/pcp-tgu-ui-service/**/*
         - helm/pcp-dynamic-plan-service/**/*
+        - helm/pcp-gateway-service/**/*
     - when: never
 
 default:
@@ -168,3 +174,4 @@ include:
   - local: .gitlab/ci/pcp-tgu-service.yml
   - local: .gitlab/ci/pcp-tgu-ui-service.yml
   - local: .gitlab/ci/pcp-dynamic-plan-service.yml
+  - local: .gitlab/ci/pcp-gateway-service.yml