fix(test): Add ENCRYPTION_KEY to bridge.module.spec.ts and fix API lint errors

apps/api/src/credentials/dto/index.ts

@@ -2,4 +2,5 @@ export * from "./create-credential.dto";
 export * from "./update-credential.dto";
 export * from "./rotate-credential.dto";
 export * from "./query-credential.dto";
+export * from "./query-credential-audit.dto";
 export * from "./credential-response.dto";

apps/api/src/credentials/dto/query-credential-audit.dto.ts

@@ -0,0 +1,67 @@
+import { ActivityAction } from "@prisma/client";
+import { IsOptional, IsEnum, IsInt, Min, Max, IsDateString, IsUUID } from "class-validator";
+import { Type } from "class-transformer";
+
+/**
+ * DTO for querying credential audit logs with filters and pagination
+ * All fields are optional - omitted filters are not applied
+ */
+export class QueryCredentialAuditDto {
+  /**
+   * Filter by specific credential ID
+   * Optional - if omitted, returns audit logs for all credentials in workspace
+   */
+  @IsOptional()
+  @IsUUID("4", { message: "credentialId must be a valid UUID" })
+  credentialId?: string;
+
+  /**
+   * Filter by activity action type
+   * Optional - supported actions:
+   * - CREDENTIAL_CREATED
+   * - CREDENTIAL_ACCESSED
+   * - CREDENTIAL_ROTATED
+   * - CREDENTIAL_REVOKED
+   * - UPDATED (for metadata changes)
+   */
+  @IsOptional()
+  @IsEnum(ActivityAction, { message: "action must be a valid ActivityAction" })
+  action?: ActivityAction;
+
+  /**
+   * Filter by start date (inclusive)
+   * Optional ISO 8601 date string
+   */
+  @IsOptional()
+  @IsDateString({}, { message: "startDate must be a valid ISO 8601 date string" })
+  startDate?: Date;
+
+  /**
+   * Filter by end date (inclusive)
+   * Optional ISO 8601 date string
+   */
+  @IsOptional()
+  @IsDateString({}, { message: "endDate must be a valid ISO 8601 date string" })
+  endDate?: Date;
+
+  /**
+   * Page number (1-indexed)
+   * Optional - defaults to 1
+   */
+  @IsOptional()
+  @Type(() => Number)
+  @IsInt({ message: "page must be an integer" })
+  @Min(1, { message: "page must be at least 1" })
+  page?: number = 1;
+
+  /**
+   * Results per page
+   * Optional - defaults to 20, max 100
+   */
+  @IsOptional()
+  @Type(() => Number)
+  @IsInt({ message: "limit must be an integer" })
+  @Min(1, { message: "limit must be at least 1" })
+  @Max(100, { message: "limit must not exceed 100" })
+  limit?: number = 20;
+}