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

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

backend/database/migrations/0009_add_link_token.up.sql

@@ -0,0 +1,26 @@
+-- Add LINK token to tokens table for ChainID 138
+-- Uses deployed MockLinkToken address on ChainID 138
+
+INSERT INTO tokens (chain_id, address, type, name, symbol, decimals, verified, description, logo_url, website_url)
+VALUES (
+    138,
+    '0xb7721dD53A8c629d9f1Ba31a5819AFe250002b03',
+    'ERC20',
+    'Chainlink Token',
+    'LINK',
+    18,
+    true,
+    'Official Chainlink LINK token from Ethereum Mainnet. Used for CCIP fees and Chainlink services.',
+    'https://raw.githubusercontent.com/chainlink/chainlink-docs/main/docs/images/chainlink-logo.svg',
+    'https://chain.link/'
+)
+ON CONFLICT (chain_id, address) DO UPDATE SET
+    name = EXCLUDED.name,
+    symbol = EXCLUDED.symbol,
+    decimals = EXCLUDED.decimals,
+    verified = EXCLUDED.verified,
+    description = EXCLUDED.description,
+    logo_url = EXCLUDED.logo_url,
+    website_url = EXCLUDED.website_url,
+    updated_at = NOW();
+