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

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

backend/database/migrations/0003_traces_table.up.sql

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+-- Traces table for storing transaction traces
+
+CREATE TABLE IF NOT EXISTS traces (
+    chain_id INTEGER NOT NULL,
+    transaction_hash VARCHAR(66) NOT NULL,
+    block_number BIGINT NOT NULL,
+    trace_data JSONB NOT NULL,
+    created_at TIMESTAMP DEFAULT NOW(),
+    PRIMARY KEY (chain_id, transaction_hash)
+) PARTITION BY LIST (chain_id);
+
+-- Create partition for ChainID 138
+CREATE TABLE IF NOT EXISTS traces_chain_138 PARTITION OF traces FOR VALUES IN (138);
+
+-- Index
+CREATE INDEX IF NOT EXISTS idx_traces_chain_tx ON traces(chain_id, transaction_hash);
+CREATE INDEX IF NOT EXISTS idx_traces_chain_block ON traces(chain_id, block_number);
+CREATE INDEX IF NOT EXISTS idx_traces_data_gin ON traces USING GIN (trace_data);
+