chore: added curosr rules for database schema (#5935)

.cursor/rules/database.mdc

@@ -0,0 +1,101 @@
+---
+description: >
+  This rule provides comprehensive knowledge about the Formbricks database structure, relationships, 
+  and data patterns. It should be used **only when the agent explicitly requests database schema-level 
+  details** to support tasks such as: writing/debugging Prisma queries, designing/reviewing data models, 
+  investigating multi-tenancy behavior, creating API endpoints, or understanding data relationships.
+globs: []
+alwaysApply: agent-requested
+---
+# Formbricks Database Schema Reference
+
+This rule provides a reference to the Formbricks database structure. For the most up-to-date and complete schema definitions, please refer to the schema.prisma file directly.
+
+## Database Overview
+
+Formbricks uses PostgreSQL with Prisma ORM. The schema is designed for multi-tenancy with strong data isolation between organizations.
+
+### Core Hierarchy
+```
+Organization
+└── Project
+    └── Environment (production/development)
+        ├── Survey
+        ├── Contact
+        ├── ActionClass
+        └── Integration
+```
+
+## Schema Reference
+
+For the complete and up-to-date database schema, please refer to:
+- Main schema: `packages/database/schema.prisma`
+- JSON type definitions: `packages/database/json-types.ts`
+
+The schema.prisma file contains all model definitions, relationships, enums, and field types. The json-types.ts file contains TypeScript type definitions for JSON fields.
+
+## Data Access Patterns
+
+### Multi-tenancy
+- All data is scoped by Organization
+- Environment-level isolation for surveys and contacts
+- Project-level grouping for related surveys
+
+### Soft Deletion
+Some models use soft deletion patterns:
+- Check `isActive` fields where present
+- Use proper filtering in queries
+
+### Cascading Deletes
+Configured cascade relationships:
+- Organization deletion cascades to all child entities
+- Survey deletion removes responses, displays, triggers
+- Contact deletion removes attributes and responses
+
+## Common Query Patterns
+
+### Survey with Responses
+```typescript
+// Include response count and latest responses
+const survey = await prisma.survey.findUnique({
+  where: { id: surveyId },
+  include: {
+    responses: {
+      take: 10,
+      orderBy: { createdAt: 'desc' }
+    },
+    _count: {
+      select: { responses: true }
+    }
+  }
+});
+```
+
+### Environment Scoping
+```typescript
+// Always scope by environment
+const surveys = await prisma.survey.findMany({
+  where: {
+    environmentId: environmentId,
+    // Additional filters...
+  }
+});
+```
+
+### Contact with Attributes
+```typescript
+const contact = await prisma.contact.findUnique({
+  where: { id: contactId },
+  include: {
+    attributes: {
+      include: {
+        attributeKey: true
+      }
+    }
+  }
+});
+```
+
+This schema supports Formbricks' core functionality: multi-tenant survey management, user targeting, response collection, and analysis, all while maintaining strict data isolation and security.
+
+