fix: error during offline theme compilation

[Andrii Havryliuk (h1k3r)]

1. Why is this change necessary?

When theme is compiled without database, and delayed invalidation is enabled, theme compiles, but user sees error message that may be confusing.

2. What does this change do, exactly?

Reduces severity of logged message to the warning mode.

3. Describe each step to reproduce the issue or behaviour.

• enable delayed cache invalidation
• configure theme compilation without db https://developer.shopware.com/docs/guides/hosting/installation-updates/deployments/build-w-o-db.html#compiling-the-storefront-without-database
• run bin/console theme:dump
• run CI=1 bin/ci theme:compile

4. Please link to the relevant issues (if any).

• closes Compiling the storefront without a database #11422

5. Checklist

• I have written tests and verified that they fail without my change
• I have updated developer-facing release notes if this change is relevant for external developers:
  • Add a short entry to RELEASE_INFO-6.<major>.md under “Upcoming” for informational changes, including the consequences of the change and how it affects external developers.
  • Add an UPGRADE section in UPGRADE-6.<next-major>.md for breaking changes (what/why/impact/how to adapt).
  • See the Documenting a Release Process for details.
• I have written or adjusted the documentation according to my changes
• This change has comments for package types, values, functions, and non-obvious lines of code
• I have read the contribution requirements and fulfilled them

[github-actions]

	Warnings
⚠️	The Pull Request doesn't contain any release info, if your changes are relevant for external developers please add an entry to the release info file, including the consequences of the change and how it affects external developers. For detailed infos please refer to the [release documentation guide](https://github.com/shopware/shopware/blob/trunk/delivery-process/documenting-a-release.md).

[explore-openapi]

OpenAPI Snapshot

Project: shopware/store-api

No changes detected

Your OpenAPI schema is identical to the base branch (trunk).

Links:
All Project Snapshots · Base Branch Snapshot

Project: shopware/admin-api

No changes detected

Your OpenAPI schema is identical to the base branch (trunk).

Links:
All Project Snapshots · Base Branch Snapshot

[codecov]

Codecov Report

❌ Patch coverage is 71.42857% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 55.35%. Comparing base (4d25bbe) to head (1cd2631).
⚠️ Report is 2 commits behind head on trunk.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
src/Core/DevOps/Environment/EnvironmentHelper.php	0.00%	1 Missing ⚠️
src/Core/Framework/App/ActiveAppsLoader.php	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##            trunk   #14543      +/-   ##
==========================================
+ Coverage   55.34%   55.35%   +0.01%     
==========================================
  Files        2962     2962              
  Lines       91414    91415       +1     
==========================================
+ Hits        50594    50604      +10     
+ Misses      40820    40811       -9     

Flag	Coverage Δ
phpunit-migration	92.23% <ø> (ø)
phpunit-unit	52.85% <71.42%> (+0.01%)	⬆️

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