chore(deps): update postgres docker tag to v18

[renovate]

This PR contains the following updates:

Package	Update	Change
postgres	major	17.5-alpine → 18.4-alpine

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[coveralls]

Coverage Report for CI Build 25886057713

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Coverage: 0.0%

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Coverage Stats

Relevant Lines:	592
Covered Lines:	0
Line Coverage:	0.0%
Coverage Strength:	0.0 hits per line

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