refactor(pcp-request-service): rename REST endpoints and DTOs for clarity

- GET /v1/requests/with-geometry → /v1/requests/map
- GET /v1/requests/{id}/with-cells → /v1/requests/{id}/cells
- GET /v1/cells/with-requests → /v1/cells/priority-map
- CreateRequestRequestDto → CreateRequestDto
- ListRequestsQueryDto → RequestListFilter
- RequestWithGeometry* → RequestMap* (RequestMapItemDto, RequestMapPageDto)
- CellsWithRequestsResponseDto → CellPriorityMapResponseDto
- DeleteRequestStatusDto removed; status field removed from DeleteRequestResponseDto

Updated all consumers (pcp-complex-mission-service, pcp-ui-service, slots-service),
tests, and OpenAPI YAML.

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

services/slots-service/src/main/kotlin/space/nstart/pcp/slots_service/service/EarthService.kt

@@ -49,7 +49,7 @@ class EarthService(
     fun reqcells(id : String): RequestWithCellsDTO? =
         webClientBuilder.build()
             .get()
-            .uri("$url/v1/requests/$id/with-cells")
+            .uri("$url/v1/requests/$id/cells")
             .retrieve()
             .bodyToMono(RequestWithCellsResponseDto::class.java)
             .block()

services/slots-service/src/test/kotlin/space/nstart/pcp/slots_service/service/EarthServiceTest.kt

@@ -115,7 +115,7 @@ class EarthServiceTest {
 
         val response = service.reqcells(requestId.toString())!!
 
-        assertEquals("/v1/requests/$requestId/with-cells", requestedUris.single().path)
+        assertEquals("/v1/requests/$requestId/cells", requestedUris.single().path)
         assertFalse(requestedUris.any { uri -> uri.path.contains("/api/requests/by-number") })
         assertEquals(requestId, response.request.requestId)
         assertEquals("Request with cells", response.request.name)