Fix: Enforce correct host port assignment for postgresql connection strings

[supersven]

Host/port misconfigurations are now logged like:

[galley@example.com] galley: user error (could not match 2 port numbers to 3 hosts)
[galley@example.com] HasCallStack backtrace:
[galley@example.com]   collectBacktraces, called at libraries/ghc-internal/src/GHC/Internal/Exception.hs:169:13 in ghc-internal:GHC.Internal.Exception
[galley@example.com]   toExceptionWithBacktrace, called at libraries/ghc-internal/src/GHC/Internal/IO.hs:260:11 in ghc-internal:GHC.Internal.IO
[galley@example.com]   throwIO, called at src/UnliftIO/Exception.hs:356:7 in unliftio-0.2.25.1-AdVaKH2Ubts3FYohk3WmeN:UnliftIO.Exception
[galley@example.com]
[galley@example.com]
[galley@b.example.com] galley: user error (could not match 2 port numbers to 3 hosts)
[galley@b.example.com] HasCallStack backtrace:
[galley@b.example.com]   collectBacktraces, called at libraries/ghc-internal/src/GHC/Internal/Exception.hs:169:13 in ghc-internal:GHC.Internal.Exception
[galley@b.example.com]   toExceptionWithBacktrace, called at libraries/ghc-internal/src/GHC/Internal/IO.hs:260:11 in ghc-internal:GHC.Internal.IO
[galley@b.example.com]   throwIO, called at src/UnliftIO/Exception.hs:356:7 in unliftio-0.2.25.1-AdVaKH2Ubts3FYohk3WmeN:UnliftIO.Exception
[galley@b.example.com]
[galley@b.example.com]
[background-worker@example.com] background-worker: user error (could not match 2 port numbers to 3 hosts)
[background-worker@example.com]
[background-worker@b.example.com] background-worker: user error (could not match 2 port numbers to 3 hosts)
[background-worker@b.example.com]

Ticket: https://wearezeta.atlassian.net/browse/WPB-27405

Checklist

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