fix(machine-a-tron): Support DevSpace ingestion reports

[kfelternv]

Manual DevSpace verification of the Machine-a-Tron ingestion harness from #4516 showed that the rate report could not find the standalone PostgreSQL StatefulSet and that its PostgreSQL 14 queries failed before producing complete output. This change discovers the DevSpace database while preserving Patroni behavior, surfaces query failures, and makes both report modes compatible with PostgreSQL 14.

Related issues

None.

Type of Change

• Add - New feature or capability
• Change - Changes in existing functionality
• Fix - Bug fixes
• Remove - Removed features or deprecated functionality
• Internal - Internal changes (refactoring, tests, docs, etc.)

Breaking Changes

• This PR contains breaking changes

Testing

• Unit tests added/updated
• Integration tests added/updated
• Manual testing performed
• No testing required (docs, internal refactor, etc.)

Additional Notes

The normal and --csv report modes were tested through the default DevSpace PostgreSQL interface.

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