Add backend models, services, and API for Scenario Mode

Co-authored-by: whyour <22700758+whyour@users.noreply.github.com>

back/data/scenario.ts

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+import { sequelize } from '.';
+import { DataTypes, Model } from 'sequelize';
+
+export class Scenario {
+  id?: number;
+  name: string;
+  description?: string;
+  isEnabled?: 1 | 0;
+  triggerType?: string; // 'variable' | 'webhook' | 'task_status' | 'time' | 'system_event'
+  triggerConfig?: any; // JSON configuration for the trigger
+  conditionLogic?: 'AND' | 'OR';
+  conditions?: any[]; // Array of condition objects
+  actions?: any[]; // Array of actions to execute
+  retryStrategy?: {
+    maxRetries: number;
+    retryDelay: number; // in seconds
+    backoffMultiplier?: number;
+    errorTypes?: string[];
+  };
+  failureThreshold?: number; // Auto-disable after N consecutive failures
+  consecutiveFailures?: number;
+  delayExecution?: number; // Delay in seconds after trigger
+  lastTriggeredAt?: Date;
+  lastExecutedAt?: Date;
+  executionCount?: number;
+  failureCount?: number;
+  successCount?: number;
+  createdAt?: Date;
+  updatedAt?: Date;
+
+  constructor(options: Scenario) {
+    this.id = options.id;
+    this.name = options.name;
+    this.description = options.description;
+    this.isEnabled = options.isEnabled ?? 1;
+    this.triggerType = options.triggerType;
+    this.triggerConfig = options.triggerConfig;
+    this.conditionLogic = options.conditionLogic || 'AND';
+    this.conditions = options.conditions || [];
+    this.actions = options.actions || [];
+    this.retryStrategy = options.retryStrategy;
+    this.failureThreshold = options.failureThreshold || 3;
+    this.consecutiveFailures = options.consecutiveFailures || 0;
+    this.delayExecution = options.delayExecution || 0;
+    this.lastTriggeredAt = options.lastTriggeredAt;
+    this.lastExecutedAt = options.lastExecutedAt;
+    this.executionCount = options.executionCount || 0;
+    this.failureCount = options.failureCount || 0;
+    this.successCount = options.successCount || 0;
+    this.createdAt = options.createdAt;
+    this.updatedAt = options.updatedAt;
+  }
+}
+
+export interface ScenarioInstance extends Model<Scenario, Scenario>, Scenario {}
+
+export const ScenarioModel = sequelize.define<ScenarioInstance>('Scenario', {
+  name: {
+    type: DataTypes.STRING,
+    allowNull: false,
+  },
+  description: DataTypes.TEXT,
+  isEnabled: {
+    type: DataTypes.NUMBER,
+    defaultValue: 1,
+  },
+  triggerType: {
+    type: DataTypes.STRING,
+    allowNull: false,
+  },
+  triggerConfig: {
+    type: DataTypes.JSON,
+    allowNull: true,
+  },
+  conditionLogic: {
+    type: DataTypes.STRING,
+    defaultValue: 'AND',
+  },
+  conditions: {
+    type: DataTypes.JSON,
+    defaultValue: [],
+  },
+  actions: {
+    type: DataTypes.JSON,
+    defaultValue: [],
+  },
+  retryStrategy: {
+    type: DataTypes.JSON,
+    allowNull: true,
+  },
+  failureThreshold: {
+    type: DataTypes.NUMBER,
+    defaultValue: 3,
+  },
+  consecutiveFailures: {
+    type: DataTypes.NUMBER,
+    defaultValue: 0,
+  },
+  delayExecution: {
+    type: DataTypes.NUMBER,
+    defaultValue: 0,
+  },
+  lastTriggeredAt: DataTypes.DATE,
+  lastExecutedAt: DataTypes.DATE,
+  executionCount: {
+    type: DataTypes.NUMBER,
+    defaultValue: 0,
+  },
+  failureCount: {
+    type: DataTypes.NUMBER,
+    defaultValue: 0,
+  },
+  successCount: {
+    type: DataTypes.NUMBER,
+    defaultValue: 0,
+  },
+});

back/data/scenarioLog.ts

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+import { sequelize } from '.';
+import { DataTypes, Model } from 'sequelize';
+
+export class ScenarioLog {
+  id?: number;
+  scenarioId: number;
+  scenarioName?: string;
+  triggerData?: any; // The data that triggered the scenario
+  conditionsMatched?: boolean;
+  executionStatus?: 'success' | 'failure' | 'partial';
+  executionDetails?: any; // Details about actions executed
+  errorMessage?: string;
+  executionTime?: number; // Time taken in milliseconds
+  retriesAttempted?: number;
+  createdAt?: Date;
+
+  constructor(options: ScenarioLog) {
+    this.id = options.id;
+    this.scenarioId = options.scenarioId;
+    this.scenarioName = options.scenarioName;
+    this.triggerData = options.triggerData;
+    this.conditionsMatched = options.conditionsMatched;
+    this.executionStatus = options.executionStatus;
+    this.executionDetails = options.executionDetails;
+    this.errorMessage = options.errorMessage;
+    this.executionTime = options.executionTime;
+    this.retriesAttempted = options.retriesAttempted || 0;
+    this.createdAt = options.createdAt;
+  }
+}
+
+export interface ScenarioLogInstance
+  extends Model<ScenarioLog, ScenarioLog>,
+    ScenarioLog {}
+
+export const ScenarioLogModel = sequelize.define<ScenarioLogInstance>(
+  'ScenarioLog',
+  {
+    scenarioId: {
+      type: DataTypes.NUMBER,
+      allowNull: false,
+    },
+    scenarioName: DataTypes.STRING,
+    triggerData: DataTypes.JSON,
+    conditionsMatched: DataTypes.BOOLEAN,
+    executionStatus: {
+      type: DataTypes.STRING,
+      allowNull: false,
+    },
+    executionDetails: DataTypes.JSON,
+    errorMessage: DataTypes.TEXT,
+    executionTime: DataTypes.NUMBER,
+    retriesAttempted: {
+      type: DataTypes.NUMBER,
+      defaultValue: 0,
+    },
+  },
+);