📝 Update docs for dependencies with yield

docs/en/docs/tutorial/dependencies/dependencies-with-yield.md

@@ -184,6 +184,51 @@ If you raise any exception in the code from the *path operation function*, it wi
 
 ///
 
+## Early exit and `scope` { #early-exit-and-scope }
+
+Normally the exit code of dependencies with `yield` is executed **after the response** is sent to the client.
+
+But if you know that you won't need to use the dependency after returning from the *path operation function*, you can use `Depends(scope="function")` to tell FastAPI that it should close the dependency after the *path operation function* returns, but **before** the **response is sent**.
+
+{* ../../docs_src/dependencies/tutorial008e_an_py39.py hl[12,16] *}
+
+`Depends()` receives a `scope` parameter that can be:
+
+* `"function"`: start the dependency before the *path operation function* that handles the request, end the dependency after the *path operation function* ends, but **before** the response is sent back to the client. So, the dependency function will be executed **around** the *path operation **function***.
+* `"request"`: start the dependency before the *path operation function* that handles the request (similar to when using `"function"`), but end **after** the response is sent back to the client. So, the dependency function will be executed **around** the **request** and response cycle.
+
+If not specified and the dependency has `yield`, it will have a `scope` of `"request"` by default.
+
+### `scope` for sub-dependencies { #scope-for-sub-dependencies }
+
+When you declare a dependency with a `scope="request"` (the default), any sub-dependency needs to also have a `scope` of `"request"`.
+
+But a dependency with `scope` of `"function"` can have dependencies with `scope` of `"function"` and `scope` of `"request"`.
+
+This is because any dependency needs to be able to run its exit code before the sub-dependencies, as it might need to still use them during its exit code.
+
+```mermaid
+sequenceDiagram
+
+participant client as Client
+participant dep_req as Dep scope="request"
+participant dep_func as Dep scope="function"
+participant operation as Path Operation
+
+    client ->> dep_req: Start request
+    Note over dep_req: Run code up to yield
+    dep_req ->> dep_func: 
+    Note over dep_func: Run code up to yield
+    dep_func ->> operation: Run path operation
+    operation ->> dep_func: Return from path operation
+    Note over dep_func: Run code after yield
+    Note over dep_func: ✅ Dependency closed
+    dep_func ->> client: Send response to client
+    Note over client: Response sent
+    Note over dep_req: Run code after yield
+    Note over dep_req: ✅ Dependency closed
+```
+
 ## Dependencies with `yield`, `HTTPException`, `except` and Background Tasks { #dependencies-with-yield-httpexception-except-and-background-tasks }
 
 Dependencies with `yield` have evolved over time to cover different use cases and fix some issues.