proto: Reserve removed field numbers

There are some gaps in EventType and GetEventsResponse field numbers
because some fields got removed from these events. Mark these field
numbers as reserved to avoid accidentally re-using them.

Move process_lsm field number from 13 to 28 since the field number 13
has already been used in the past. It's still safe to change the field
number for process_lsm since we haven't released the process_lsm APIs
[^1].

[^1]: #2566

Suggested-by: Lorenz Bauer <[email protected]>
Signed-off-by: Michi Mutsuzaki <[email protected]>

api/v1/tetragon/events.proto

@@ -17,16 +17,17 @@ import "google/protobuf/field_mask.proto";
 // NOTE: EventType constants must be in sync with the numbers used in the
 // GetEventsResponse event oneof.
 enum EventType {
-	UNDEF = 0;
+    reserved 2 to 4, 6 to 8, 13 to 26;
+    UNDEF = 0;
 
     PROCESS_EXEC = 1;
     PROCESS_EXIT = 5;
     PROCESS_KPROBE = 9;
     PROCESS_TRACEPOINT = 10;
     PROCESS_LOADER = 11;
     PROCESS_UPROBE = 12;
-    PROCESS_LSM = 13;
     PROCESS_THROTTLE = 27;
+    PROCESS_LSM = 28;
 
     TEST = 40000;
     RATE_LIMIT_INFO = 40001;
@@ -169,6 +170,7 @@ message ProcessThrottle {
 }
 
 message GetEventsResponse {
+    reserved 2 to 4, 6 to 8, 13 to 26;
     // The type-specific fields of an event.
     //
     // NOTE: Numbers must stay in sync with enum EventType.
@@ -186,8 +188,8 @@ message GetEventsResponse {
         ProcessTracepoint process_tracepoint = 10;
         ProcessLoader process_loader = 11;
         ProcessUprobe process_uprobe = 12;
-        ProcessLsm process_lsm = 13;
         ProcessThrottle process_throttle = 27;
+        ProcessLsm process_lsm = 28;
 
         Test test = 40000;
         RateLimitInfo rate_limit_info = 40001;