implemented teams integration

migrations/add_teams_accounts.sql

@@ -0,0 +1,17 @@
+-- Migration: Add Teams accounts table for Microsoft Teams Bot integration
+-- Run this in Supabase SQL editor before deploying Teams bot feature
+
+CREATE TABLE teams_accounts (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    user_id UUID NOT NULL REFERENCES profiles(id) ON DELETE CASCADE,
+    teams_user_id TEXT,
+    teams_tenant_id TEXT,
+    teams_service_url TEXT NOT NULL,
+    teams_conversation_id TEXT NOT NULL,
+    is_active BOOLEAN NOT NULL DEFAULT TRUE,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    CONSTRAINT teams_accounts_user_id_unique UNIQUE (user_id)
+);
+
+CREATE INDEX idx_teams_accounts_user_id ON teams_accounts (user_id);