state/kvindexer: associate event attributes with events (#9759)

* Updated event sequencing and added query keyword

* code cosmetics

* Documentation update

* Added per event indexing and querying to txindexer

* rpc test fix

* Added support for older versions where event sequencing is not supported

* Added support for old versions to tx indexer

* Added RPC match flag, fixed bugs in tx indexer, added tests

* Removed reference to match.events from the docs

* Openapi update

* Added height deduplication
Co-authored-by: Thane Thomson <connect@thanethomson.com>

Co-authored-by: Anca Zamfir <zamfiranca@gmail.com>
Co-authored-by: Sergio Mena <sergio@informal.systems>
Co-authored-by: Romain Ruetschi <romain.ruetschi@gmail.com>
Co-authored-by: Thane Thomson <connect@thanethomson.com>

rpc/openapi/openapi.yaml

@@ -1092,6 +1092,14 @@ paths:
             type: string
             default: "asc"
             example: "asc"
+        - in: query
+          name: match_events
+          description: Match attributes in query within events, in addition to the height & txhash
+          required: false
+          schema:
+            type: boolean
+            default: false
+            example: true
       tags:
         - Info
       responses:
@@ -1147,6 +1155,14 @@ paths:
             type: string
             default: "desc"
             example: "asc"
+        - in: query
+          name: match_events
+          description: Match attributes in query within events, in addition to the height
+          required: false
+          schema:
+            type: boolean
+            default: false
+            example: true
       tags:
         - Info
       responses: