docs: changelog entries for separate Tools, Functions and tool server switches

CHANGELOG.md

@@ -17,6 +17,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - 🏎️ **Native hybrid search on Milvus.** Hybrid search on Milvus 2.5 and newer, with one collection per knowledge base or with multitenancy, now runs inside Milvus with its built-in BM25 full-text search next to the vectors in the same collection, where every search loaded every chunk of the collection into Open WebUI and scored it there, making hybrid search on Milvus much faster and lighter on memory; the BM25 weight setting works the same way it does on pgvector. [#31645](https://github.com/open-webui/open-webui/pull/31645), [#31660](https://github.com/open-webui/open-webui/pull/31660), [#26243](https://github.com/open-webui/open-webui/issues/26243)
 - 🪙 **Input and output tokens in analytics.** Hovering, focusing or clicking the token total on the admin Analytics dashboard now shows how many of those tokens were input and how many were output. [Commit](https://github.com/open-webui/open-webui/commit/7e317fbada4acc5c48f326aa5935b3928275ea78), [#31646](https://github.com/open-webui/open-webui/issues/31646)
 - 🚀 **Faster JSON handling across the app.** Every instance now reads and writes JSON with orjson, speeding up request and response bodies, streamed provider responses and live socket updates, which now encode about 17 times and decode about 3 times faster. [#31616](https://github.com/open-webui/open-webui/pull/31616)
+- 🎚️ **Separate switches for Tools, Functions and tool servers.** Administrators can now turn off workspace Tools, Functions or external tool servers on their own with "ENABLE_TOOLS", "ENABLE_FUNCTIONS" and "ENABLE_TOOL_SERVERS", so in-process plugins can be switched off while OpenAPI, MCP and Open Terminal servers keep working, or the other way round. [Commit](https://github.com/open-webui/open-webui/commit/f50f9e6252209760d0b96f090766e91fb826ecba), [#31509](https://github.com/open-webui/open-webui/issues/31509)
 - 🔄 **General improvements.** Various improvements were implemented across the application to enhance performance, stability, and security.
 - 🌐 **Translation updates.** Translations for German, Italian, Turkish, Persian, Indonesian, Catalan, French, Malay and Simplified Chinese were enhanced and expanded.
 
@@ -176,6 +177,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 
 - ⚠️ **IMPORTANT for Milvus and Milvus multitenancy users: back up your Milvus data before upgrading**: On its first start with "ENABLE_DB_MIGRATIONS" on (the default), this release rebuilds every existing Milvus collection so its vectors, text and BM25 keyword index live together, and Open WebUI only finishes starting once that is done; every collection is copied in full, vectors included, which ran at 11 to 22 MB/s on one 16-thread machine with the official Milvus docker compose setup, so 200 GB takes about 2.5 to 5 hours depending on chunk size, and it needs free disk space for a second copy of all your Milvus data until it finishes. Nothing is re-embedded, and the original collections are only dropped after every copy has succeeded: a failed run changes nothing and is retried on the next start. The migration was tested extensively on real installations, including across a Milvus 2.6 to 3.0.2 upgrade, but no testing covers every setup, so back up first and avoid upgrading Milvus and Open WebUI on the same day where you can. Hybrid search on Milvus needs Milvus 2.5 or newer; on 2.4 and older the migration is skipped and there is no native hybrid search. [#31645](https://github.com/open-webui/open-webui/pull/31645), [#31660](https://github.com/open-webui/open-webui/pull/31660)
+- 🔌 **ENABLE_PLUGINS is the master switch.** Setting "ENABLE_PLUGINS=false" now turns off every kind of plugin, including external OpenAPI, MCP and Open Terminal servers and personal direct connections, and overrides "ENABLE_TOOLS", "ENABLE_FUNCTIONS" and "ENABLE_TOOL_SERVERS"; all four need a restart to take effect. [Commit](https://github.com/open-webui/open-webui/commit/f50f9e6252209760d0b96f090766e91fb826ecba), [#31509](https://github.com/open-webui/open-webui/issues/31509)
 - ⚡ **orjson on by default.** "ENABLE_ORJSON" now defaults to on, and setting "ENABLE_ORJSON=false" switches back to the standard JSON encoder. [#31616](https://github.com/open-webui/open-webui/pull/31616)
 - 🔁 **Update Redis-backed instances together.** Where several servers share their websocket traffic through Redis, every instance should be updated at the same time, since live chat updates sent by an updated instance do not reach one still on an older version unless "WEBSOCKET_REDIS_ROOM_CHANNELS" is set to false. [#28818](https://github.com/open-webui/open-webui/pull/28818)