Calender & Linked Added

Web_Calendar/database/011_calendar_events.sql

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+CREATE TABLE IF NOT EXISTS scheduled_events (
+  id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
+  user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+  participant_id UUID REFERENCES users(id) ON DELETE SET NULL,
+  lead_id UUID REFERENCES leads(id) ON DELETE SET NULL,
+  conversation_id UUID REFERENCES conversations(id) ON DELETE SET NULL,
+  title VARCHAR(255) NOT NULL,
+  description TEXT,
+  event_type VARCHAR(20) NOT NULL DEFAULT 'meeting',
+  start_time TIMESTAMPTZ NOT NULL,
+  end_time TIMESTAMPTZ,
+  duration_minutes INT,
+  status VARCHAR(20) NOT NULL DEFAULT 'scheduled',
+  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+  CONSTRAINT chk_event_type CHECK (event_type IN ('meeting','call','chat','follow_up','demo','other')),
+  CONSTRAINT chk_event_status CHECK (status IN ('scheduled','completed','cancelled','rescheduled'))
+);
+
+CREATE INDEX IF NOT EXISTS idx_scheduled_events_user ON scheduled_events(user_id, start_time);
+CREATE INDEX IF NOT EXISTS idx_scheduled_events_participant ON scheduled_events(participant_id);
+CREATE INDEX IF NOT EXISTS idx_scheduled_events_lead ON scheduled_events(lead_id);
+CREATE INDEX IF NOT EXISTS idx_scheduled_events_date ON scheduled_events(start_time);
+CREATE INDEX IF NOT EXISTS idx_scheduled_events_status ON scheduled_events(user_id, status);