scouting: Fix types for action timestamps and cycle times

Since we measure in nanoseconds (to be in line with what the robot
code does) we need a bigger type than `int32`. This patch changes
these fields to be `int64` instead.

Signed-off-by: Philipp Schrader <philipp.schrader@gmail.com>
Change-Id: Ibffc37e74b333ae12330ab1c4fedd34879113a9d
diff --git a/scouting/db/db.go b/scouting/db/db.go
index adf1eae..bc32e12 100644
--- a/scouting/db/db.go
+++ b/scouting/db/db.go
@@ -75,7 +75,7 @@
 	LowConesAuto, MiddleConesAuto, HighConesAuto, ConesDroppedAuto int32
 	LowCubes, MiddleCubes, HighCubes, CubesDropped                 int32
 	LowCones, MiddleCones, HighCones, ConesDropped                 int32
-	AvgCycle                                                       int32
+	AvgCycle                                                       int64
 	// The username of the person who collected these statistics.
 	// "unknown" if submitted without logging in.
 	// Empty if the stats have not yet been collected.