feat: Add teleport_configs DB migration + TypeORM entity

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/migrations/014_teleport_configs.sql

@@ -0,0 +1,12 @@
+-- Teleport configuration profiles for NTeleportation integration
+CREATE TABLE teleport_configs (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    license_id UUID NOT NULL REFERENCES licenses(id) ON DELETE CASCADE,
+    config_name VARCHAR(100) NOT NULL,
+    description TEXT,
+    config_data JSONB NOT NULL DEFAULT '{}',
+    is_active BOOLEAN NOT NULL DEFAULT false,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+CREATE INDEX idx_teleport_configs_license ON teleport_configs(license_id);