refactor: Unify severity and level for all application errors for Sentry (no-changelog) (#7956)

## Summary
Unify `severity` and `level` for all backend application errors for
Sentry

Follow-up to:
https://github.com/n8n-io/n8n/pull/7914#issuecomment-1840433542

...

#### How to test the change:
1. ...


## Issues fixed
Include links to Github issue or Community forum post or **Linear
ticket**:
> Important in order to close automatically and provide context to
reviewers

...


## Review / Merge checklist
- [ ] PR title and summary are descriptive. **Remember, the title
automatically goes into the changelog. Use `(no-changelog)` otherwise.**
([conventions](https://github.com/n8n-io/n8n/blob/master/.github/pull_request_title_conventions.md))
- [ ] [Docs updated](https://github.com/n8n-io/n8n-docs) or follow-up
ticket created.
- [ ] Tests included.
> A bug is not considered fixed, unless a test is added to prevent it
from happening again. A feature is not complete without tests.
  >
> *(internal)* You can use Slack commands to trigger [e2e
tests](https://www.notion.so/n8n/How-to-use-Test-Instances-d65f49dfc51f441ea44367fb6f67eb0a?pvs=4#a39f9e5ba64a48b58a71d81c837e8227)
or [deploy test
instance](https://www.notion.so/n8n/How-to-use-Test-Instances-d65f49dfc51f441ea44367fb6f67eb0a?pvs=4#f6a177d32bde4b57ae2da0b8e454bfce)
or [deploy early access version on
Cloud](https://www.notion.so/n8n/Cloudbot-3dbe779836004972b7057bc989526998?pvs=4#fef2d36ab02247e1a0f65a74f6fb534e).

packages/workflow/src/Interfaces.ts

@@ -2381,5 +2381,4 @@ export type BannerName =
 	| 'NON_PRODUCTION_LICENSE'
 	| 'EMAIL_CONFIRMATION';
 
-export type Severity = 'warning' | 'error';
 export type Functionality = 'regular' | 'configuration-node';

packages/workflow/src/errors/abstract/execution-base.error.ts

@@ -1,4 +1,4 @@
-import type { Functionality, IDataObject, JsonObject, Severity } from '../../Interfaces';
+import type { Functionality, IDataObject, JsonObject } from '../../Interfaces';
 import { ApplicationError } from '../application.error';
 
 interface ExecutionBaseErrorOptions {
@@ -19,8 +19,6 @@ export abstract class ExecutionBaseError extends ApplicationError {
 
 	lineNumber: number | undefined;
 
-	severity: Severity = 'error';
-
 	functionality: Functionality = 'regular';
 
 	constructor(message: string, { cause, errorResponse }: ExecutionBaseErrorOptions = {}) {

packages/workflow/src/errors/application.error.ts

@@ -7,7 +7,7 @@ export type ReportingOptions = {
 } & Pick<Event, 'tags' | 'extra'>;
 
 export class ApplicationError extends Error {
-	readonly level: Level;
+	level: Level;
 
 	readonly tags?: Event['tags'];
 

packages/workflow/src/errors/node-api.error.ts

@@ -9,18 +9,18 @@ import type {
 	JsonObject,
 	IDataObject,
 	IStatusCodeMessages,
-	Severity,
 	Functionality,
 } from '../Interfaces';
 import { NodeError } from './abstract/node.error';
 import { removeCircularRefs } from '../utils';
+import type { ReportingOptions } from './application.error';
 
 export interface NodeOperationErrorOptions {
 	message?: string;
 	description?: string;
 	runIndex?: number;
 	itemIndex?: number;
-	severity?: Severity;
+	level?: ReportingOptions['level'];
 	messageMapping?: { [key: string]: string }; // allows to pass custom mapping for error messages scoped to a node
 	functionality?: Functionality;
 }
@@ -120,7 +120,7 @@ export class NodeApiError extends NodeError {
 			parseXml,
 			runIndex,
 			itemIndex,
-			severity,
+			level,
 			functionality,
 			messageMapping,
 		}: NodeApiErrorOptions = {},
@@ -174,10 +174,10 @@ export class NodeApiError extends NodeError {
 				this.findProperty(errorResponse, ERROR_STATUS_PROPERTIES, ERROR_NESTING_PROPERTIES) ?? null;
 		}
 
-		if (severity) {
-			this.severity = severity;
+		if (level) {
+			this.level = level;
 		} else if (this.httpCode?.charAt(0) !== '5') {
-			this.severity = 'warning';
+			this.level = 'warning';
 		}
 
 		// set description of this error

packages/workflow/src/errors/node-operation.error.ts

@@ -19,7 +19,7 @@ export class NodeOperationError extends NodeError {
 		super(node, error);
 
 		if (options.message) this.message = options.message;
-		if (options.severity) this.severity = options.severity;
+		if (options.level) this.level = options.level;
 		if (options.functionality) this.functionality = options.functionality;
 		this.description = options.description;
 		this.context.runIndex = options.runIndex;

packages/workflow/src/errors/webhook-taken.error.ts

@@ -4,7 +4,7 @@ export class WebhookPathTakenError extends WorkflowActivationError {
 	constructor(nodeName: string, cause?: Error) {
 		super(
 			`The URL path that the "${nodeName}" node uses is already taken. Please change it to something else.`,
-			{ severity: 'warning', cause },
+			{ level: 'warning', cause },
 		);
 	}
 }

packages/workflow/src/errors/workflow-activation.error.ts

@@ -1,10 +1,11 @@
-import type { INode, Severity } from '../Interfaces';
+import type { INode } from '../Interfaces';
 import { ExecutionBaseError } from './abstract/execution-base.error';
+import type { ApplicationError } from './application.error';
 
 interface WorkflowActivationErrorOptions {
 	cause?: Error;
 	node?: INode;
-	severity?: Severity;
+	level?: ApplicationError['level'];
 	workflowId?: string;
 }
 
@@ -18,7 +19,7 @@ export class WorkflowActivationError extends ExecutionBaseError {
 
 	constructor(
 		message: string,
-		{ cause, node, severity, workflowId }: WorkflowActivationErrorOptions = {},
+		{ cause, node, level, workflowId }: WorkflowActivationErrorOptions = {},
 	) {
 		let error = cause as Error;
 		if (cause instanceof ExecutionBaseError) {
@@ -31,6 +32,6 @@ export class WorkflowActivationError extends ExecutionBaseError {
 		this.node = node;
 		this.workflowId = workflowId;
 		this.message = message;
-		if (severity) this.severity = severity;
+		if (level) this.level = level;
 	}
 }

packages/workflow/src/errors/workflow-operation.error.ts

@@ -15,7 +15,7 @@ export class WorkflowOperationError extends ExecutionBaseError {
 
 	constructor(message: string, node?: INode, description?: string) {
 		super(message, { cause: undefined });
-		this.severity = 'warning';
+		this.level = 'warning';
 		this.name = this.constructor.name;
 		if (description) this.description = description;
 		this.node = node;