Initial BizOne portal setup

reference/03-database-schema.md

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+# Database Schema
+
+## Main Tables
+- users
+- roles
+- permissions
+- role_permissions
+- contacts
+- tags
+- contact_tags
+- senders
+- templates
+- drafts
+- campaigns
+- campaign_recipients
+- conversations
+- messages
+- webhook_events
+- integration_configs
+- activity_logs
+- jobs
+
+## Key Notes
+- Use UUID primary keys
+- Store raw provider payloads in JSONB
+- Normalize webhook events into internal event types
+- Use created_at and updated_at on all mutable entities
+- Track message lifecycle timestamps: sent, delivered, read, failed
+
+## Suggested Enums
+### User Status
+- active
+- inactive
+- suspended
+
+### Template Status
+- draft
+- pending
+- approved
+- rejected
+- archived
+
+### Campaign Status
+- draft
+- scheduled
+- processing
+- completed
+- paused
+- failed
+- cancelled
+
+### Message Status
+- queued
+- sent
+- delivered
+- read
+- failed