fix(ci): Address some plumbing issues

Squashed commit of the following:

commit 112a14e
Author: Rafael Espinoza <rafael@rafaelespinoza.com>
Date:   Sun Sep 24 14:00:56 2023 -0700

    fix(ci): Ensure running container so that cp_coverage_to_host works

commit aca9b17
Author: Rafael Espinoza <rafael@rafaelespinoza.com>
Date:   Sun Sep 24 12:44:43 2023 -0700

    fix(ci/postgres): Allow client to connect to server

    Something must have changed in recent base images for postgres server.
    Previously, there weren't any issues connecting to DB. But now have this
    error message from the server:
      no pg_hba.conf entry for host "172.18.0.3", user "godfish", database "godfish_test", no encryption

    Ensure that this test DB is connectable.

.ci/cp_coverage_to_host.sh

@@ -7,7 +7,24 @@ set -eu
 
 docker_compose_filename="${1:?missing docker_compose_filename}"
 
+if [ ! -f "${docker_compose_filename}" ]; then
+	echo >&2 "no file at ${docker_compose_filename}"
+	exit 1
+fi
+
+echo >&2 "ensuring that client container is running..."
+docker-compose -f "${docker_compose_filename}" start client
+
+# Only needed the client container for this step, but starting one container will probably also
+# start any containers that the target depended on. Should ensure that those dependee containers are
+# also stopped.
+trap 'docker-compose -f "${docker_compose_filename}" stop -t 5' EXIT
+
 docker_container_id="$(docker-compose -f "${docker_compose_filename}" ps -q client)"
+if [ -z "${docker_container_id}" ]; then
+	echo >&2 "no container id found"
+	exit 1
+fi
 
 docker cp "${docker_container_id}:/tmp/cover.out" /tmp
 docker cp "${docker_container_id}:/tmp/cover_driver.out" /tmp

.ci/postgres/server.sh

@@ -19,3 +19,10 @@ su - postgres -c "psql -v ON_ERROR_STOP=1" <<-SQL
 	CREATE DATABASE ${dbname} WITH ENCODING utf8 OWNER ${dbuser};
 	GRANT ALL PRIVILEGES ON DATABASE ${dbname} TO ${dbuser};
 SQL
+
+if [ ! -d "${PGDATA}" ]; then
+	echo >&2 "directory, ${PGDATA}, does not exist"
+	exit 1
+fi
+
+echo "host ${dbname} ${dbuser} all trust" >> "${PGDATA}/pg_hba.conf"