v7.0.0-pr.3637.3

PR testing build for #3637 — provider-agnostic PostgreSQL (#3636, #3734, #3735, #3736).

Fixes a defect that end-to-end testing of v7.0.0-pr.3637.2 uncovered: the Node services were connecting to PostgreSQL in plaintext despite sslmode resolving to require.

The published umbrella chart contains thirteen copies of the magda-common library chart — twelve of them older copies vendored by third-party subcharts. Helm's template namespace is flat and last-definition-wins, so the shared credential helper resolved to a stale copy predating PGSSLMODE. Rendering magda-core alone never showed it.

Not for production use.