Add full monorepo: virtual-banker, backend, frontend, docs, scripts, deployment

Co-authored-by: Cursor <cursoragent@cursor.com>

database/migrations/002_conversations.up.sql

@@ -0,0 +1,15 @@
+-- Additional indexes for conversations
+CREATE INDEX IF NOT EXISTS idx_conversations_started_at ON conversations(started_at);
+CREATE INDEX IF NOT EXISTS idx_conversations_ended_at ON conversations(ended_at);
+
+-- Create conversation_state table for workflow state
+CREATE TABLE IF NOT EXISTS conversation_state (
+    session_id VARCHAR(255) PRIMARY KEY REFERENCES sessions(id) ON DELETE CASCADE,
+    workflow VARCHAR(255),
+    step VARCHAR(255),
+    context JSONB DEFAULT '{}'::jsonb,
+    created_at TIMESTAMP NOT NULL DEFAULT NOW(),
+    updated_at TIMESTAMP NOT NULL DEFAULT NOW(),
+    expires_at TIMESTAMP
+);
+