Add proto definitions to support tunneled sandboxes

This commit adds proto definitions that allow sandboxes to be created
with open ports specified. It also adds an RPC definition for getting
the tunnels once established.

modal_proto/api.proto

@@ -1717,6 +1717,11 @@ message S3Mount {
   bool read_only = 4;
 }
 
+message PortSpec {
+  uint32 port = 1;
+  bool unencrypted = 2;
+}
+
 message Sandbox {
   repeated string entrypoint_args = 1;
   repeated string mount_ids = 2;
@@ -1750,6 +1755,7 @@ message Sandbox {
   repeated Resources _experimental_resources = 18; // overrides `resources` field above
 
   string worker_id = 19; // for internal debugging use only
+  repeated PortSpec open_ports = 20;
 }
 
 message SandboxCreateRequest {
@@ -1823,6 +1829,21 @@ message SandboxWaitResponse {
   GenericResult result = 1;
 }
 
+message SandboxGetTunnelsRequest {
+  string sandbox_id = 1;
+}
+
+message TunnelData {
+  string host = 1;
+  uint32 port = 2;
+  optional string unencrypted_host = 3;
+  optional uint32 unencrypted_port = 4;
+}
+
+message SandboxGetTunnelsResponse {
+  repeated TunnelData tunnels = 1;
+}
+
 message Schedule {
   message Cron {
     string cron_string = 1;
@@ -2349,6 +2370,7 @@ service ModalClient {
   rpc SandboxCreate(SandboxCreateRequest) returns (SandboxCreateResponse);
   rpc SandboxGetLogs(SandboxGetLogsRequest) returns (stream TaskLogsBatch);
   rpc SandboxGetTaskId(SandboxGetTaskIdRequest) returns (SandboxGetTaskIdResponse); // needed for modal container exec
+  rpc SandboxGetTunnels(SandboxGetTunnelsRequest) returns (SandboxGetTunnelsResponse);
   rpc SandboxList(SandboxListRequest) returns (SandboxListResponse);
   rpc SandboxStdinWrite(SandboxStdinWriteRequest) returns (SandboxStdinWriteResponse);
   rpc SandboxTerminate(SandboxTerminateRequest) returns (SandboxTerminateResponse);