[chore] background-worker: remove config http calls to galley

[battermann]

Checklist

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

[Copilot]

Pull request overview

Removes background-worker’s dependency on internal Galley HTTP/RPC calls for “configured feature flags” and “conversation subsystem config” by constructing these values directly from the loaded Galley config, and deletes the corresponding internal Galley endpoints.

Changes:

• Removed internal Galley routes/handlers for GET /i/features/configured and GET /i/conversations/config and removed the corresponding RPC effect operations.
• Extended background-worker Env to carry featureFlags and conversationSubsystemConfig, and wired interpreters to use these local values instead of fetching from Galley.
• Updated background-worker unit tests to construct the new Env fields; added changelog entry.

Reviewed changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
services/galley/src/Galley/API/Internal.hs	Drops internal handlers for conversation config and configured feature flags.
services/background-worker/test/Test/Wire/Util.hs	Updates test Env construction with featureFlags and conversationSubsystemConfig.
services/background-worker/test/Test/Wire/BackendNotificationPusherSpec.hs	Updates local test Env records to include new fields.
services/background-worker/src/Wire/Effects.hs	Switches interpreters to use env.featureFlags / env.conversationSubsystemConfig instead of Galley RPC calls.
services/background-worker/src/Wire/BackgroundWorker/Env.hs	Adds featureFlags and conversationSubsystemConfig to Env and builds them from Galley config (including loading MLS keys).
libs/wire-subsystems/test/unit/Wire/MockInterpreters/GalleyAPIAccess.hs	Removes mock support for deleted Galley API access operations.
libs/wire-subsystems/src/Wire/GalleyAPIAccess/Rpc.hs	Removes RPC calls for deleted internal Galley endpoints.
libs/wire-subsystems/src/Wire/GalleyAPIAccess.hs	Removes GalleyAPIAccess constructors for deleted operations.
libs/wire-api/src/Wire/API/Routes/Internal/Galley.hs	Removes internal API route definitions for the deleted endpoints.
changelog.d/5-internal/bg-worker-config-clean-up	Documents the background-worker config fetch removal.