Merge #5346

5346: Hotfix typo tolerance bug r=Kerollmops a=ManyTheFish

# Pull Request

## Related issue
Fixes #5240

## What does this PR do?
- Add a test reproducing the bug
- fix the bug by relying on the exact_word database

## Explanation

The new indexer introduced in V1.12 does not put the exact attributes words in the word FST, but the old indexer was doing it.
So 2 fixes were possible:
1) Add the word from the exact-words database in the FST knowing that they should never be retrieved with a typo
2) Make the search check in the exact-word database in addition to the word FST to know if the word exists

This PR implements the second fix

## Impact of the bug

A word can't be retrieved if it only appears in attributes listed in the `typoTolerance.disableOnAttributes` setting.


Co-authored-by: ManyTheFish <many@meilisearch.com>

crates/meilisearch/tests/search/mod.rs

@@ -128,6 +128,40 @@ async fn search_with_stop_word() {
           .await;
 }
 
+#[actix_rt::test]
+async fn search_with_typo_settings() {
+    // related to https://github.com/meilisearch/meilisearch/issues/5240
+    let server = Server::new().await;
+    let index = server.index("test");
+
+    let (_, code) = index
+        .update_settings(json!({"typoTolerance": { "disableOnAttributes": ["title", "id"]}}))
+        .await;
+    meili_snap::snapshot!(code, @"202 Accepted");
+
+    let documents = DOCUMENTS.clone();
+    let (task, _status_code) = index.add_documents(documents, None).await;
+    index.wait_task(task.uid()).await.succeeded();
+
+    index
+        .search(json!({"q": "287947" }), |response, code| {
+            assert_eq!(code, 200, "{}", response);
+            snapshot!(json_string!(response["hits"]), @r###"
+            [
+              {
+                "title": "Shazam!",
+                "id": "287947",
+                "color": [
+                  "green",
+                  "blue"
+                ]
+              }
+            ]
+            "###);
+        })
+        .await;
+}
+
 #[actix_rt::test]
 async fn phrase_search_with_stop_word() {
     // related to https://github.com/meilisearch/meilisearch/issues/3521

crates/milli/src/search/new/query_term/compute_derivations.rs

@@ -215,7 +215,7 @@ pub fn partially_initialized_term_from_word(
     let mut zero_typo = None;
     let mut prefix_of = BTreeSet::new();
 
-    if fst.contains(word) {
+    if fst.contains(word) || ctx.index.exact_word_docids.get(ctx.txn, word)?.is_some() {
         zero_typo = Some(word_interned);
     }