fix: pass explicit postgres user in Verdaccio sanity test

The sanity container runs as root, so the CLI's auto-discovery
connected to postgres as "root" — which doesn't exist. Fix:
- Add TEST_PG_USER=postgres to docker-compose env vars
- Export ALTIMATE_CODE_CONN_PG_TEST with explicit user/password
  in smoke-tests.sh so the CLI uses the correct credentials

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: anandgupta42

test/sanity/docker-compose.verdaccio.yml

@@ -22,6 +22,7 @@ services:
       - ALTIMATE_CODE_CONN_SNOWFLAKE_TEST
       - TEST_PG_HOST=postgres
       - TEST_PG_PORT=5432
+      - TEST_PG_USER=postgres
       - TEST_PG_PASSWORD=testpass123
       - TEST_MONGODB_HOST=mongodb
       - TEST_MONGODB_PORT=27017

test/sanity/phases/smoke-tests.sh

@@ -91,6 +91,10 @@ test_postgres() {
     fi
   fi
   cd "$WORKDIR" || return 1
+  # Export explicit connection config so the CLI doesn't guess the user
+  local pg_user="${TEST_PG_USER:-postgres}"
+  local pg_pass="${TEST_PG_PASSWORD:-testpass123}"
+  export ALTIMATE_CODE_CONN_PG_TEST="{\"type\":\"postgres\",\"host\":\"${pg_host}\",\"port\":${pg_port},\"user\":\"${pg_user}\",\"password\":\"${pg_pass}\",\"database\":\"postgres\"}"
   altimate_run "postgres" "run SELECT 1 against postgres at ${pg_host}:${pg_port}"
   local output=$(get_output "postgres")
   if echo "$output" | grep -qi "TIMEOUT\|unhandled"; then