feat: добавить базовые сервисы image-platform

- добавлены backend, admin, gateway и worker skeleton
- добавлены Drizzle schema, database package и initial migration
- добавлены shared packages для RabbitMQ topology и S3 helpers
- обновлены dev-инфраструктура, env example, scripts и dependencies
- обновлена документация под versioned image URLs и read-through flow

apps/gateway/src/server.ts

@@ -0,0 +1,90 @@
+import Fastify from "fastify"
+
+import type { GatewayConfig } from "./config.js"
+import { proxyToUpstream } from "./proxy.js"
+
+export function createGatewayServer(config: GatewayConfig) {
+  const app = Fastify({
+    logger: true,
+  })
+
+  app.get("/health", async () => ({
+    service: "image-platform-gateway",
+    status: "ok",
+  }))
+
+  app.get<{ Params: ImageParams; Querystring: ImageQuery }>(
+    "/images/:assetId/:version/:preset",
+    async (request, reply) => {
+      const version = parseVersionParam(request.params.version)
+
+      if (version === null) {
+        return reply.code(400).send({
+          message: "image version must use v{number} format",
+          statusCode: 400,
+        })
+      }
+
+      const width = parseOptionalInteger(request.query.w)
+      const quality = parseOptionalInteger(request.query.q)
+      const format = request.query.f ?? "auto"
+
+      return reply.code(501).header("cache-control", "no-store").send({
+        assetId: request.params.assetId,
+        format,
+        message: "image gateway read-through pipeline is not implemented yet",
+        preset: request.params.preset,
+        quality,
+        status: "not_implemented",
+        version,
+        width,
+      })
+    },
+  )
+
+  app.all("/api/*", async (request, reply) => proxyToUpstream(request, reply, config.backendUpstream))
+  app.all("/docs", async (request, reply) => proxyToUpstream(request, reply, config.backendUpstream))
+  app.all("/docs/*", async (request, reply) => proxyToUpstream(request, reply, config.backendUpstream))
+  app.all("/docs-json", async (request, reply) => proxyToUpstream(request, reply, config.backendUpstream))
+
+  app.setNotFoundHandler(async (_request, reply) => {
+    return reply.code(404).send({
+      message: "route not found",
+      statusCode: 404,
+    })
+  })
+
+  return app
+}
+
+type ImageQuery = {
+  f?: string
+  q?: string
+  w?: string
+}
+
+type ImageParams = {
+  assetId: string
+  preset: string
+  version: string
+}
+
+function parseVersionParam(value: string) {
+  if (!value.startsWith("v")) {
+    return null
+  }
+
+  const parsed = Number.parseInt(value.slice(1), 10)
+
+  return Number.isSafeInteger(parsed) && parsed > 0 ? parsed : null
+}
+
+function parseOptionalInteger(value: string | undefined) {
+  if (!value) {
+    return null
+  }
+
+  const parsed = Number.parseInt(value, 10)
+
+  return Number.isFinite(parsed) ? parsed : null
+}