Simplify code

[ananthb]

Used a library for retrying HTTP requests automatically.

Moved the haproxy certificate tool that was slowly brewing here out into it's own separate repository.

[github-actions]

Code Coverage Report

Total Coverage: total: (statements) 31.7%

Coverage by function

==========================================
  Certificator Development Environment
==========================================

Go version (from go.mod): 1.25.5
Go version (active):      go1.25.5
HAProxy version:          HAProxy version 3.3.0-7832fb2 2025/11/26 - https://haproxy.org/
Data Plane API:           2026/01/22 09:50:18 maxprocs: Leaving GOMAXPROCS=4: CPU quota undefined

Available commands:
  build            - Build certificator and certificatee
  run-tests        - Run unit tests
  test-coverage    - Run tests with coverage report
  test-watch       - Watch for changes and run tests
  tidy             - Tidy go.mod dependencies
  check            - Run all checks (fmt, vet, lint, test)
  clean            - Clean build artifacts

github.com/vinted/certificator/cmd/certificatee/helpers.go:9:		createHAProxyClients		0.0%
github.com/vinted/certificator/cmd/certificatee/main.go:23:		main				0.0%
github.com/vinted/certificator/cmd/certificatee/main.go:74:		maybeUpdateCertificates		0.0%
github.com/vinted/certificator/cmd/certificatee/main.go:90:		processHAProxyEndpoint		0.0%
github.com/vinted/certificator/cmd/certificatee/main.go:161:		shouldUpdateCertificate		0.0%
github.com/vinted/certificator/cmd/certificatee/main.go:187:		serialsDiffer			100.0%
github.com/vinted/certificator/cmd/certificatee/main.go:199:		formatSerial			100.0%
github.com/vinted/certificator/cmd/certificatee/main.go:203:		updateCertificate		0.0%
github.com/vinted/certificator/cmd/certificatee/main.go:225:		buildPEMBundle			100.0%
github.com/vinted/certificator/cmd/certificatee/main.go:251:		endsWith			100.0%
github.com/vinted/certificator/cmd/certificator/main.go:18:		main				0.0%
github.com/vinted/certificator/pkg/acme/acme.go:27:			GetEmail			0.0%
github.com/vinted/certificator/pkg/acme/acme.go:32:			GetRegistration			0.0%
github.com/vinted/certificator/pkg/acme/acme.go:37:			GetPrivateKey			0.0%
github.com/vinted/certificator/pkg/acme/acme.go:42:			NewClient			0.0%
github.com/vinted/certificator/pkg/acme/acme.go:61:			setupClient			0.0%
github.com/vinted/certificator/pkg/acme/acme.go:80:			setupAccount			0.0%
github.com/vinted/certificator/pkg/acme/acme.go:118:			newAccount			0.0%
github.com/vinted/certificator/pkg/acme/acme.go:130:			getAccountKey			0.0%
github.com/vinted/certificator/pkg/acme/acme.go:159:			registerAccount			0.0%
github.com/vinted/certificator/pkg/acme/acme.go:177:			recoverAccount			0.0%
github.com/vinted/certificator/pkg/acme/acme.go:211:			saveAccount			0.0%
github.com/vinted/certificator/pkg/acme/acme.go:221:			saveKey				0.0%
github.com/vinted/certificator/pkg/certificate/certificate.go:18:	ObtainCertificate		0.0%
github.com/vinted/certificator/pkg/certificate/certificate.go:50:	GetCertificate			0.0%
github.com/vinted/certificator/pkg/certificate/certificate.go:68:	NeedsReissuing			0.0%
github.com/vinted/certificator/pkg/certificate/certificate.go:96:	arraysEqual			0.0%
github.com/vinted/certificator/pkg/certificate/certificate.go:110:	arrayContains			0.0%
github.com/vinted/certificator/pkg/certificate/certificate.go:119:	VaultCertLocation		0.0%
github.com/vinted/certificator/pkg/certificate/certificate.go:123:	storeCertificateInVault		0.0%
github.com/vinted/certificator/pkg/certmetrics/metrics.go:61:		StartMetricsServer		0.0%
github.com/vinted/certificator/pkg/certmetrics/metrics.go:81:		PushMetrics			0.0%
github.com/vinted/certificator/pkg/config/config.go:72:			LoadConfig			0.0%
github.com/vinted/certificator/pkg/haproxy/client.go:60:		NewClient			100.0%
github.com/vinted/certificator/pkg/haproxy/client.go:95:		NewClients			92.3%
github.com/vinted/certificator/pkg/haproxy/client.go:120:		Endpoint			100.0%
github.com/vinted/certificator/pkg/haproxy/client.go:125:		doRequest			88.9%
github.com/vinted/certificator/pkg/haproxy/client.go:159:		ListCertificates		100.0%
github.com/vinted/certificator/pkg/haproxy/client.go:173:		ListCertificateRefs		85.7%
github.com/vinted/certificator/pkg/haproxy/client.go:211:		GetCertificateInfo		100.0%
github.com/vinted/certificator/pkg/haproxy/client.go:216:		GetCertificateInfoByPath	84.2%
github.com/vinted/certificator/pkg/haproxy/client.go:251:		GetCertificateInfoByRef		0.0%
github.com/vinted/certificator/pkg/haproxy/client.go:262:		parsePEMCertificate		87.5%
github.com/vinted/certificator/pkg/haproxy/client.go:287:		parseDataPlaneAPITime		100.0%
github.com/vinted/certificator/pkg/haproxy/client.go:308:		UpdateCertificate		80.0%
github.com/vinted/certificator/pkg/haproxy/client.go:344:		CreateCertificate		78.9%
github.com/vinted/certificator/pkg/haproxy/client.go:379:		DeleteCertificate		100.0%
github.com/vinted/certificator/pkg/haproxy/client.go:398:		ExtractDomainFromPath		100.0%
github.com/vinted/certificator/pkg/haproxy/client.go:416:		IsExpiring			100.0%
github.com/vinted/certificator/pkg/haproxy/client.go:427:		NormalizeSerial			100.0%
github.com/vinted/certificator/pkg/haproxy/client.go:437:		Error				100.0%
github.com/vinted/certificator/pkg/haproxy/client.go:441:		Info				0.0%
github.com/vinted/certificator/pkg/haproxy/client.go:445:		Debug				100.0%
github.com/vinted/certificator/pkg/haproxy/client.go:449:		Warn				0.0%
github.com/vinted/certificator/pkg/haproxy/client.go:454:		toLogrusFields			85.7%
github.com/vinted/certificator/pkg/vault/vault.go:18:			NewVaultClient			0.0%
github.com/vinted/certificator/pkg/vault/vault.go:27:			KVWrite				0.0%
github.com/vinted/certificator/pkg/vault/vault.go:41:			KVRead				0.0%
github.com/vinted/certificator/pkg/vault/vault.go:62:			vaultFullPath			0.0%
total:									(statements)			31.7%