feat: Add metadata for raft data

[gtema]

When we write/read to the DS we may need metadata (creation time,
revision, etc). This is also necessary for the data encryption. It also
allows to implement checks for modification operations (expect revision
number).

[github-actions]

🦢 Load Test Results

Goose Attack Report

Plan Overview

Action	Started	Stopped	Elapsed	Users
Increasing	26-04-19 14:34:27	26-04-19 14:34:29	00:00:02	0 → 4
Maintaining	26-04-19 14:34:29	26-04-19 14:35:00	00:00:31	4
Decreasing	26-04-19 14:35:00	26-04-19 14:35:00	00:00:00	0 ← 4

Request Metrics

Method	Name	# Requests	# Fails	Average (ms)	Min (ms)	Max (ms)	RPS	Failures/s
GET		7066	0	16.50	9	41	235.53	0.00
	Aggregated	7066	0	16.50	9	41	235.53	0.00

Response Time Metrics

Method	Name	50%ile (ms)	60%ile (ms)	70%ile (ms)	80%ile (ms)	90%ile (ms)	95%ile (ms)	99%ile (ms)	100%ile (ms)
GET		14	15	21	22	23	24	26	41
	Aggregated	14	15	21	22	23	24	26	41

Status Code Metrics

Method	Name	Status Codes
GET		7,066 [200]
	Aggregated	7,066 [200]

Transaction Metrics

Transaction	# Times Run	# Fails	Average (ms)	Min (ms)	Max (ms)	RPS	Failures/s
ListUsers
0.0	0	0	0.00	0	0	0.00	0.00
0.1	4478	0	12.93	9	22	149.27	0.00
ValidateToken
1.0	0	0	0.00	0	0	0.00	0.00
1.1	2588	0	22.76	18	41	86.27	0.00
Aggregated	7066	0	16.50	9	41	235.53	0.00

Scenario Metrics

Transaction	# Users	# Times Run	Average (ms)	Min (ms)	Max (ms)	Scenarios/s	Iterations
ListUsers	2	4476	12.93	9	22	149.20	2238.00
ValidateToken	2	2586	22.77	18	41	86.20	1293.00
Aggregated	4	7062	16.53	9	41	235.40	3531.00

View full report

[github-actions]

Bencher Report

Branch	raft
Testbed	ubuntu-latest

Click to view all benchmark results

Benchmark	Latency	Benchmark Result nanoseconds (ns) (Result Δ%)	Upper Boundary nanoseconds (ns) (Limit %)
Command_Serde/apply/remove	📈 view plot 🚷 view threshold	120,550.00 ns
Command_Serde/apply/set	📈 view plot 🚷 view threshold	120,500.00 ns
Command_Serde/serde/delete_pack	📈 view plot 🚷 view threshold	119.49 ns (+13.88%) Baseline: 104.93 ns	1,576.52 ns (7.58%)
Command_Serde/serde/delete_unpack	📈 view plot 🚷 view threshold	181.22 ns (+49.39%) Baseline: 121.30 ns	3,261.49 ns (5.56%)
Command_Serde/serde/set_pack	📈 view plot 🚷 view threshold	190.13 ns (+48.89%) Baseline: 127.70 ns	2,399.09 ns (7.93%)
Command_Serde/serde/set_unpack	📈 view plot 🚷 view threshold	242.84 ns (+54.61%) Baseline: 157.06 ns	3,854.44 ns (6.30%)
Payload_encryption/pack/inner	📈 view plot 🚷 view threshold	65.56 ns
Payload_encryption/pack/remove_cmd	📈 view plot 🚷 view threshold	116.45 ns
Payload_encryption/pack/set_cmd	📈 view plot 🚷 view threshold	186.64 ns
Payload_encryption/unpack/inner	📈 view plot 🚷 view threshold	172.17 ns
Payload_encryption/unpack/remove_cmd	📈 view plot 🚷 view threshold	190.66 ns
Payload_encryption/unpack/set_cmd	📈 view plot 🚷 view threshold	252.46 ns
Raft_1Node_Latency/prefix/1node	📈 view plot 🚷 view threshold	3,616,200.00 ns (-2.53%) Baseline: 3,710,150.00 ns	72,578,786.31 ns (4.98%)
Raft_1Node_Latency/read/1node	📈 view plot 🚷 view threshold	557.21 ns (+93.71%) Baseline: 287.65 ns	680.35 ns (81.90%)
Raft_1Node_Latency/remove/1node	📈 view plot 🚷 view threshold	351,230.00 ns (+19.79%) Baseline: 293,205.00 ns	3,719,964.60 ns (9.44%)
Raft_1Node_Latency/write/1node	📈 view plot 🚷 view threshold	352,050.00 ns (+17.67%) Baseline: 299,190.00 ns	4,101,556.63 ns (8.58%)
build_snapshot/default	📈 view plot 🚷 view threshold	87,765.00 ns
fernet token/project	📈 view plot 🚷 view threshold	1,470.10 ns (-0.14%) Baseline: 1,472.16 ns	1,552.64 ns (94.68%)
get_data_keyspace	📈 view plot 🚷 view threshold	0.31 ns
get_db	📈 view plot 🚷 view threshold	0.31 ns
get_fernet_token_timestamp/project	📈 view plot 🚷 view threshold	156.94 ns (+5.16%) Baseline: 149.24 ns	169.85 ns (92.40%)
get_keyspace	📈 view plot 🚷 view threshold	4.33 ns

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