fix(backend): allow blank prompt when creating tasks

backend/src/main/kotlin/com/condado/newsletter/dto/EntityTaskDtos.kt

@@ -9,7 +9,7 @@ import java.util.UUID
 data class EntityTaskCreateDto(
     @field:NotNull val entityId: UUID,
     @field:NotBlank val name: String,
-    @field:NotBlank val prompt: String,
+    val prompt: String,
     @field:NotBlank val scheduleCron: String,
     @field:NotBlank val emailLookback: String
 )

backend/src/test/kotlin/com/condado/newsletter/controller/EntityTaskControllerTest.kt

@@ -0,0 +1,74 @@
+package com.condado.newsletter.controller
+
+import com.condado.newsletter.model.VirtualEntity
+import com.condado.newsletter.repository.EntityTaskRepository
+import com.condado.newsletter.repository.GeneratedMessageHistoryRepository
+import com.condado.newsletter.repository.VirtualEntityRepository
+import com.condado.newsletter.scheduler.EntityScheduler
+import com.condado.newsletter.service.JwtService
+import com.ninjasquad.springmockk.MockkBean
+import jakarta.servlet.http.Cookie
+import org.junit.jupiter.api.AfterEach
+import org.junit.jupiter.api.Test
+import org.springframework.beans.factory.annotation.Autowired
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc
+import org.springframework.boot.test.context.SpringBootTest
+import org.springframework.http.MediaType
+import org.springframework.test.web.servlet.MockMvc
+import org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post
+import org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath
+import org.springframework.test.web.servlet.result.MockMvcResultMatchers.status
+
+@SpringBootTest
+@AutoConfigureMockMvc
+class EntityTaskControllerTest {
+
+    @Autowired lateinit var mockMvc: MockMvc
+    @Autowired lateinit var jwtService: JwtService
+    @Autowired lateinit var virtualEntityRepository: VirtualEntityRepository
+    @Autowired lateinit var entityTaskRepository: EntityTaskRepository
+    @Autowired lateinit var generatedMessageHistoryRepository: GeneratedMessageHistoryRepository
+
+    @MockkBean lateinit var entityScheduler: EntityScheduler
+
+    private fun authCookie() = Cookie("jwt", jwtService.generateToken())
+
+    @AfterEach
+    fun cleanUp() {
+        generatedMessageHistoryRepository.deleteAll()
+        entityTaskRepository.deleteAll()
+        virtualEntityRepository.deleteAll()
+    }
+
+    @Test
+    fun should_createTask_when_promptIsBlankInCreateRequest() {
+        val entity = virtualEntityRepository.save(
+            VirtualEntity(
+                name = "Entity A",
+                email = "entity-a@condado.com",
+                jobTitle = "Ops"
+            )
+        )
+
+        val payload = """
+            {
+              "entityId": "${entity.id}",
+              "name": "Morning Blast",
+              "prompt": "",
+              "scheduleCron": "0 8 * * 1-5",
+              "emailLookback": "last_week"
+            }
+        """.trimIndent()
+
+        mockMvc.perform(
+            post("/api/v1/tasks")
+                .cookie(authCookie())
+                .contentType(MediaType.APPLICATION_JSON)
+                .content(payload)
+        )
+            .andExpect(status().isCreated)
+            .andExpect(jsonPath("$.entityId").value(entity.id.toString()))
+            .andExpect(jsonPath("$.name").value("Morning Blast"))
+            .andExpect(jsonPath("$.prompt").value(""))
+    }
+}