build(docker): update postgres:18-alpine docker digest to 9a8afca

[renovate]

This PR contains the following updates:

Package	Update	Change
postgres	digest	54451ec → 9a8afca

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Configuration

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[coderabbitai]

📝 Walkthrough

Walkthrough

Two Docker Compose configuration files update pinned PostgreSQL 18-alpine container image digests to newer SHA256 values: compose.ci.yml and compose.postgres.yml. No service configuration, environment variables, ports, volumes, or inter-service dependencies are modified.

Changes

PostgreSQL Image Updates

Layer / File(s)	Summary
PostgreSQL image digest pins compose.ci.yml, compose.postgres.yml	Postgres 18-alpine image digests updated in both CI and development compose files to new pinned SHA256 values.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Possibly related issues

• 0xSysR3ll/scroblarr#6: Matches dependency digest updates reported in the Renovate Dependency Dashboard for PostgreSQL container image pins.

Possibly related PRs

• 0xSysR3ll/scroblarr#50: Both PRs update pinned Docker image digests in Docker Compose YAML files without modifying service logic or shared configuration.

Suggested reviewers

• 0xSysR3ll

Poem

🐰 A rabbit hops through pinned SHA digests,
Postgres eighteen gets its newest tests,
Compose files gleam with updated hashes true,
Two small lines changed, dependencies refreshed anew! 🌱

🚥 Pre-merge checks | ✅ 3 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Title check	⚠️ Warning	The title matches the dependency update, but it cites the wrong postgres digest, which is misleading.	Update the title to reflect the actual digest changed in the PR, or omit the hash if you want a simpler summary.

✅ Passed checks (3 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

Flag	Coverage Δ
backend	43.68% <ø> (ø)
frontend	43.68% <ø> (ø)

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