Initial content scanner integration (#7139)

* Create a `ContentScanner` component:

- Add `:features:contentscanner:api` module with the interface.
- Implement the concrete component using the Rust SDK in `:libraries:matrix:impl`.

This can be used to both set up the content scanner media fetching in the SDK Client and manually scanning media sources from the Android side

* Create `ContentScannerUrlProvider` in a new `:features:contentscaner:api` module as a noop implementation

Use it as a placeholder for the code to instantiate a `RustContentScanner` with the fetched URL and set it as part of the SDK client.

* Expose the optional `ContentScanner` in the `@SessionScope`

* Split the storage part of the Element well-known retriever so it can be reused for the non-session bound retriever.

Also add the new `content_scanner_url` field to it.

This will be used by the enterprise code to fetch the actual content scanner url.

* Bump enterprise commit to have access to the actual content scanner url provider implementation

* Fix tests and lint issues

* Use the right namespace for `:features:contentscanner:api`, also use the right namespace for `impl`

---------

Co-authored-by: Benoit Marty <benoitm@element.io>

libraries/wellknown/api/src/main/kotlin/io/element/android/libraries/wellknown/api/ElementWellKnown.kt

@@ -16,4 +16,5 @@ data class ElementWellKnown(
     val notificationSound: String?,
     val identityProviderAppScheme: String?,
     val customRecoveryPassphrase: CustomRecoveryPassphrase?,
+    val contentScannerUrl: String?,
 )

libraries/wellknown/api/src/main/kotlin/io/element/android/libraries/wellknown/api/ElementWellknownStore.kt

@@ -0,0 +1,14 @@
+/*
+ * Copyright (c) 2026 Element Creations Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.libraries.wellknown.api
+
+interface ElementWellknownStore {
+    suspend fun get(domain: String): WellknownRetrieverResult<ElementWellKnown>
+    suspend fun update(domain: String, wellknown: String): Result<Unit>
+    suspend fun delete(domain: String): Result<Unit>
+}

libraries/wellknown/api/src/main/kotlin/io/element/android/libraries/wellknown/api/WellknownRetrieverResult.kt

@@ -14,6 +14,11 @@ sealed interface WellknownRetrieverResult<out T> {
      */
     data class Success<out T>(val data: T) : WellknownRetrieverResult<T>
 
+    /**
+     * Well-known data has been retrieved from the local cache but is outdated and a manual refresh has been launched.
+     */
+    data class Outdated<out T>(val data: T) : WellknownRetrieverResult<T>
+
     /**
      * Well-known data is not found (file does not exist server side, we got a 404).
      */
@@ -26,6 +31,7 @@ sealed interface WellknownRetrieverResult<out T> {
 
     fun dataOrNull(): T? = when (this) {
         is Success<T> -> data
+        is Outdated<T> -> data
         is Error -> null
         NotFound -> null
     }