feat(api): add admin bulk import endpoints (MS21-MIG-004) (#567)

Co-authored-by: Jason Woltje <jason@diversecanvas.com>
Co-committed-by: Jason Woltje <jason@diversecanvas.com>

apps/api/src/import/dto/import-task.dto.ts

@@ -0,0 +1,76 @@
+import { IsArray, IsNumber, IsOptional, IsString, MaxLength, MinLength } from "class-validator";
+
+/**
+ * DTO for a single jarvis-brain task record.
+ * This matches the task object shape consumed by scripts/migrate-brain.ts.
+ */
+export class ImportTaskDto {
+  @IsString({ message: "id must be a string" })
+  @MinLength(1, { message: "id must not be empty" })
+  @MaxLength(255, { message: "id must not exceed 255 characters" })
+  id!: string;
+
+  @IsString({ message: "title must be a string" })
+  @MinLength(1, { message: "title must not be empty" })
+  @MaxLength(255, { message: "title must not exceed 255 characters" })
+  title!: string;
+
+  @IsOptional()
+  @IsString({ message: "domain must be a string" })
+  domain?: string | null;
+
+  @IsOptional()
+  @IsString({ message: "project must be a string" })
+  project?: string | null;
+
+  @IsOptional()
+  @IsArray({ message: "related must be an array" })
+  @IsString({ each: true, message: "related items must be strings" })
+  related?: string[];
+
+  @IsOptional()
+  @IsString({ message: "priority must be a string" })
+  priority?: string | null;
+
+  @IsOptional()
+  @IsString({ message: "status must be a string" })
+  status?: string | null;
+
+  @IsOptional()
+  @IsNumber({}, { message: "progress must be a number" })
+  progress?: number | null;
+
+  @IsOptional()
+  @IsString({ message: "due must be a string" })
+  due?: string | null;
+
+  @IsOptional()
+  @IsArray({ message: "blocks must be an array" })
+  @IsString({ each: true, message: "blocks items must be strings" })
+  blocks?: string[];
+
+  @IsOptional()
+  @IsArray({ message: "blocked_by must be an array" })
+  @IsString({ each: true, message: "blocked_by items must be strings" })
+  blocked_by?: string[];
+
+  @IsOptional()
+  @IsString({ message: "assignee must be a string" })
+  assignee?: string | null;
+
+  @IsOptional()
+  @IsString({ message: "created must be a string" })
+  created?: string | null;
+
+  @IsOptional()
+  @IsString({ message: "updated must be a string" })
+  updated?: string | null;
+
+  @IsOptional()
+  @IsString({ message: "notes must be a string" })
+  notes?: string | null;
+
+  @IsOptional()
+  @IsString({ message: "notes_nontechnical must be a string" })
+  notes_nontechnical?: string | null;
+}