estimator messages add explicit timestamp_sample

- timestamp is uORB publication metadata
 - this allows us to see what the system saw at publication time plus the latency in estimation

msg/estimator_innovations.msg

@@ -1,4 +1,5 @@
 uint64 timestamp		# time since system start (microseconds)
+uint64 timestamp_sample         # the timestamp of the raw data (microseconds)
 
 # GPS
 float32[2] gps_hvel	# horizontal GPS velocity innovation (m/sec) and innovation variance ((m/sec)**2)

msg/estimator_sensor_bias.msg

@@ -4,6 +4,7 @@
 #
 
 uint64 timestamp		# time since system start (microseconds)
+uint64 timestamp_sample         # the timestamp of the raw data (microseconds)
 
 # In-run bias estimates (subtract from uncorrected data)
 

msg/estimator_states.msg

@@ -1,4 +1,5 @@
 uint64 timestamp		# time since system start (microseconds)
+uint64 timestamp_sample         # the timestamp of the raw data (microseconds)
 
 float32[24] states		# Internal filter states
 uint8 n_states		# Number of states effectively used

msg/estimator_status.msg

@@ -1,4 +1,5 @@
 uint64 timestamp		# time since system start (microseconds)
+uint64 timestamp_sample         # the timestamp of the raw data (microseconds)
 
 float32[3] vibe			# IMU vibration metrics in the following array locations
 # 0 : Gyro delta angle coning metric = filtered length of (delta_angle x prev_delta_angle)

msg/vehicle_attitude.msg

@@ -2,6 +2,8 @@
 
 uint64 timestamp		# time since system start (microseconds)
 
+uint64 timestamp_sample         # the timestamp of the raw data (microseconds)
+
 float32[4] q			# Quaternion rotation from XYZ body frame to NED earth frame.
 float32[4] delta_q_reset 	# Amount by which quaternion has changed during last reset
 uint8 quat_reset_counter	# Quaternion reset counter

msg/vehicle_global_position.msg

@@ -6,6 +6,7 @@
 #
 
 uint64 timestamp		# time since system start (microseconds)
+uint64 timestamp_sample         # the timestamp of the raw data (microseconds)
 
 float64 lat			# Latitude, (degrees)
 float64 lon			# Longitude, (degrees)

msg/vehicle_local_position.msg

@@ -1,6 +1,7 @@
 # Fused local position in NED.
 
 uint64 timestamp			# time since system start (microseconds)
+uint64 timestamp_sample                 # the timestamp of the raw data (microseconds)
 
 bool xy_valid				# true if x and y are valid
 bool z_valid				# true if z is valid

msg/wind_estimate.msg

@@ -1,4 +1,6 @@
 uint64 timestamp		# time since system start (microseconds)
+uint64 timestamp_sample         # the timestamp of the raw data (microseconds)
+
 float32 windspeed_north		# Wind component in north / X direction (m/sec)
 float32 windspeed_east		# Wind component in east / Y direction (m/sec)
 

msg/yaw_estimator_status.msg

@@ -1,6 +1,9 @@
-uint64 timestamp	# time since system start (microseconds)
+uint64 timestamp		# time since system start (microseconds)
+uint64 timestamp_sample         # the timestamp of the raw data (microseconds)
+
 float32 yaw_composite	# composite yaw from GSF (rad)
 float32 yaw_variance	# composite yaw variance from GSF (rad^2)
+
 float32[5] yaw		# yaw estimate for each model in the filter bank (rad)
 float32[5] innov_vn	# North velocity innovation for each model in the filter bank (m/s)
 float32[5] innov_ve	# East velocity innovation for each model in the filter bank (m/s)