Add reverse_attach_ref field to DAP server types

Summary:
# Context
When we receive a `reverse_attach` event in DAP, we check if the ref is the same as the one stored in the DAP server state.

# Problem
We do not have a field for `reverse_attach_ref` in the configuring and attached states.

# This diff
Adds a field `reverse_attach_ref` to these states that are `reference() | undefined`

Reviewed By: michalmuskala

Differential Revision: D81452980

fbshipit-source-id: c7e73454cddb938907e7b61f4ca69f62297cc22c

Co-authored-by: Agastya Bahl <agastyabahl@meta.com>

Author: 2 people

edb/src/edb_dap_internal_events.erl

@@ -117,7 +117,7 @@ paused_impl(#{state := S}, Event) ->
     State :: edb_dap_server:state(),
     Reaction :: reaction().
 reverse_attach_impl({attached, Node}, State0 = #{state := launching}) ->
-    State1 = maps:without([reverse_attach_ref, shell_process_id], State0),
+    State1 = maps:without([shell_process_id], State0),
 
     % elp:ignore W0014 -- debugger relies on dist
     ProcessId = list_to_integer(erpc:call(Node, os, getpid, [])),

edb/src/edb_dap_request_attach.erl

@@ -85,6 +85,7 @@ handle(State0 = #{state := initialized}, Args) ->
                     process_id => ProcessId
                 },
                 node => Node,
+                reverse_attach_ref => undefined,
                 cwd => edb_dap_utils:strip_suffix(Cwd, StripSourcePrefix),
                 subscription => Subscription
             },

edb/src/edb_dap_server.erl

@@ -88,6 +88,7 @@ For details see https://microsoft.github.io/debug-adapter-protocol/specification
         type := attach_type(),
         client_info := client_info(),
         node := node(),
+        reverse_attach_ref := reference() | undefined,
         cwd := binary(),
         subscription := edb:event_subscription()
     }
@@ -97,6 +98,7 @@ For details see https://microsoft.github.io/debug-adapter-protocol/specification
         type := attach_type(),
         client_info := client_info(),
         node := node(),
+        reverse_attach_ref := reference() | undefined,
         cwd := binary(),
         subscription := edb:event_subscription()
     }