WPB-20206 create a new feature flag asset audit log

[battermann]

Checklist

• Add a new entry in an appropriate subdirectory of changelog.d
• Read and follow the PR guidelines

[Copilot]

Pull Request Overview

This PR adds a new feature flag AssetAuditLog to the Wire server codebase. The feature flag is designed to be global and immutable, with no configuration payload and always locked status.

• Implements AssetAuditLogConfig feature flag infrastructure across the API and type system
• Adds configuration support in Helm charts and deployment files
• Includes comprehensive test coverage for the new feature flag

Reviewed Changes

Copilot reviewed 16 out of 16 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
libs/wire-api/src/Wire/API/Team/Feature.hs	Defines the AssetAuditLogConfig type and implements required feature interfaces
services/galley/src/Galley/API/Teams/Features/Get.hs	Adds GetFeatureConfig instance for AssetAuditLogConfig
services/galley/src/Galley/API/Public/Feature.hs	Registers the feature in the public API routing
libs/wire-api/src/Wire/API/Routes/Public/Galley/Feature.hs	Adds FeatureAPIGet route for AssetAuditLogConfig
services/galley/src/Galley/API/Internal.hs	Adds internal API support for the feature
libs/wire-api/src/Wire/API/Routes/Internal/Galley.hs	Defines internal feature API routing for AssetAuditLogConfig
libs/galley-types/src/Galley/Types/Teams.hs	Implements FeatureDefaults for AssetAuditLogConfig
integration/test/Test/FeatureFlags/AssetAuditLog.hs	Comprehensive test suite for the new feature flag
integration/test/Test/FeatureFlags/Util.hs	Updates test utilities to include the new feature
integration/integration.cabal	Registers the new test module
services/galley/galley.integration.yaml	Adds integration test configuration
hack/helm_vars/wire-server/values.yaml.gotmpl	Updates Helm template values
charts/galley/values.yaml	Adds default configuration values
charts/galley/templates/configmap.yaml	Updates Helm template to include the feature
docs/src/developer/reference/config-options.md	Documents the new feature flag
changelog.d/2-features/WPB-20206	Adds changelog entry

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[supersven]

LGTM 👍

[supersven]

@copilot why haven't you approved this PR?