Add expense CRUD

migrations/000070_create_expenses_table.down.sql

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+DROP TABLE IF EXISTS expenses;

migrations/000070_create_expenses_table.up.sql

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+CREATE TABLE expenses (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    organization_id UUID NOT NULL REFERENCES organizations(id) ON DELETE CASCADE,
+    outlet_id UUID NOT NULL REFERENCES outlets(id) ON DELETE CASCADE,
+    receiver VARCHAR(255) NOT NULL,
+    transaction_date DATE NOT NULL,
+    code_number VARCHAR(50) NOT NULL,
+    chart_of_account_id UUID NOT NULL REFERENCES chart_of_accounts(id) ON DELETE RESTRICT,
+    description TEXT,
+    tax DECIMAL(15,2) NOT NULL DEFAULT 0,
+    total DECIMAL(15,2) NOT NULL DEFAULT 0,
+    reserved1 TEXT,
+    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
+    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
+);
+
+CREATE INDEX idx_expenses_organization_id ON expenses(organization_id);
+CREATE INDEX idx_expenses_outlet_id ON expenses(outlet_id);
+CREATE INDEX idx_expenses_chart_of_account_id ON expenses(chart_of_account_id);
+CREATE INDEX idx_expenses_transaction_date ON expenses(transaction_date);
+CREATE INDEX idx_expenses_code_number ON expenses(code_number);
+CREATE INDEX idx_expenses_created_at ON expenses(created_at);