feat: Implement ConfigManager for config watching

[gtema]

Add a manager for automatic config reloading together with the
certificate files watching.

[github-actions]

🦢 Load Test Results

Goose Attack Report

Plan Overview

Action	Started	Stopped	Elapsed	Users
Increasing	26-05-05 16:44:13	26-05-05 16:44:15	00:00:02	0 → 4
Maintaining	26-05-05 16:44:15	26-05-05 16:44:45	00:00:30	4
Decreasing	26-05-05 16:44:45	26-05-05 16:44:45	00:00:00	0 ← 4

Request Metrics

Method	Name	# Requests	# Fails	Average (ms)	Min (ms)	Max (ms)	RPS	Failures/s
GET		6283	0	18.60	11	45	209.43	0.00
	Aggregated	6283	0	18.60	11	45	209.43	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		16	19	23	24	25	26	29	45
	Aggregated	16	19	23	24	25	26	29	45

Status Code Metrics

Method	Name	Status Codes
GET		6,283 [200]
	Aggregated	6,283 [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	3855	0	15.11	11	33	128.50	0.00
ValidateToken
1.0	0	0	0.00	0	0	0.00	0.00
1.1	2428	0	24.28	19	45	80.93	0.00
Aggregated	6283	0	18.60	11	45	209.43	0.00

Scenario Metrics

Transaction	# Users	# Times Run	Average (ms)	Min (ms)	Max (ms)	Scenarios/s	Iterations
ListUsers	2	3853	15.11	11	33	128.43	1926.50
ValidateToken	2	2426	24.28	19	45	80.87	1213.00
Aggregated	4	6279	18.65	11	45	209.30	3139.50

View full report