feat: Implement LTI deep linking, live sessions, predictive analytics, and portfolios with associated UI and database migrations.

services/lms-service/migrations/20260226010000_dropout_risks.sql

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+CREATE OR REPLACE FUNCTION update_updated_at_column()
+RETURNS TRIGGER AS $$
+BEGIN
+    NEW.updated_at = NOW();
+    RETURN NEW;
+END;
+$$ language 'plpgsql';
+
+CREATE TYPE dropout_risk_level AS ENUM ('low', 'medium', 'high', 'critical');
+
+CREATE TABLE IF NOT EXISTS dropout_risks (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    organization_id UUID NOT NULL REFERENCES organizations(id),
+    course_id UUID NOT NULL REFERENCES courses(id),
+    user_id UUID NOT NULL REFERENCES users(id),
+    risk_level dropout_risk_level NOT NULL DEFAULT 'low',
+    score REAL NOT NULL DEFAULT 0.0,
+    reasons JSONB,
+    last_calculated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    UNIQUE(course_id, user_id)
+);
+
+-- Trigger for updated_at
+CREATE TRIGGER update_dropout_risks_updated_at
+BEFORE UPDATE ON dropout_risks
+FOR EACH ROW
+EXECUTE FUNCTION update_updated_at_column();