cereal fork compatibility (#34414)

* more custom

* cleanup

* lil more

cereal/custom.capnp

@@ -7,7 +7,9 @@ $Cxx.namespace("cereal");
 # These structs are guaranteed to remain reserved and empty in mainline
 # cereal, so use these if you want custom events in your fork.
 
-# you can rename the struct, but don't change the identifier
+# DO rename the structs
+# DON'T change the identifier (e.g. @0x81c2f05a394cf4af)
+
 struct CustomReserved0 @0x81c2f05a394cf4af {
 }
 
@@ -37,3 +39,33 @@ struct CustomReserved8 @0xf416ec09499d9d19 {
 
 struct CustomReserved9 @0xa1680744031fdb2d {
 }
+
+struct CustomReserved10 @0xcb9fd56c7057593a {
+}
+
+struct CustomReserved11 @0xc2243c65e0340384 {
+}
+
+struct CustomReserved12 @0x9ccdc8676701b412 {
+}
+
+struct CustomReserved13 @0xcd96dafb67a082d0 {
+}
+
+struct CustomReserved14 @0xb057204d7deadf3f {
+}
+
+struct CustomReserved15 @0xbd443b539493bc68 {
+}
+
+struct CustomReserved16 @0xfc6241ed8877b611 {
+}
+
+struct CustomReserved17 @0xa30662f84033036c {
+}
+
+struct CustomReserved18 @0xc86a3d38d13eb3ef {
+}
+
+struct CustomReserved19 @0xa4f1eb3323f5f582 {
+}

cereal/log.capnp

@@ -2554,11 +2554,17 @@ struct Event {
     livestreamWideRoadEncodeData @121 :EncodeData;
     livestreamDriverEncodeData @122 :EncodeData;
 
+    # *********** Custom: reserved for forks ***********
+
+    # DO change the name of the field
+    # DON'T change anything after the "@"
     customReservedRawData0 @124 :Data;
     customReservedRawData1 @125 :Data;
     customReservedRawData2 @126 :Data;
 
-    # *********** Custom: reserved for forks ***********
+    # DO change the name of the field and struct
+    # DON'T change the ID (e.g. @107)
+    # DON'T change which struct it points to 
     customReserved0 @107 :Custom.CustomReserved0;
     customReserved1 @108 :Custom.CustomReserved1;
     customReserved2 @109 :Custom.CustomReserved2;
@@ -2569,6 +2575,16 @@ struct Event {
     customReserved7 @114 :Custom.CustomReserved7;
     customReserved8 @115 :Custom.CustomReserved8;
     customReserved9 @116 :Custom.CustomReserved9;
+    customReserved10 @136 :Custom.CustomReserved10;
+    customReserved11 @137 :Custom.CustomReserved11;
+    customReserved12 @138 :Custom.CustomReserved12;
+    customReserved13 @139 :Custom.CustomReserved13;
+    customReserved14 @140 :Custom.CustomReserved14;
+    customReserved15 @141 :Custom.CustomReserved15;
+    customReserved16 @142 :Custom.CustomReserved16;
+    customReserved17 @143 :Custom.CustomReserved17;
+    customReserved18 @144 :Custom.CustomReserved18;
+    customReserved19 @145 :Custom.CustomReserved19;
 
     # *********** legacy + deprecated ***********
     model @9 :Legacy.ModelData; # TODO: rename modelV2 and mark this as deprecated