[-] remove host_config querying from GetSources()

[0xgouda]

Remove host_config querying from GetSources().

The reaper fails to read sources from postgres due to pgx.CollectRows[Source] in GetSources() giving error about missing host_config field from Source Struct

go run ./cmd/pgwatch --sources=postgres://postgres:postgres@localhost:5432/postgres --sink=jsonfile://file.json
2025-07-24 22:21:47.569 [ERROR] [error:struct doesn't have corresponding row field host_config] could not refresh active sources, using last valid cache
2025-07-24 22:21:47.571 [INFO] [metrics:73] [presets:17] metrics and presets refreshed

host_config field was removed from source in #859

[coveralls]

Pull Request Test Coverage Report for Build 16505851832

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.007%) to 63.901%

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Totals
Change from base Build 16501542019:	-0.007%
Covered Lines:	3181
Relevant Lines:	4978

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💛 - Coveralls