fix: send other proxy headers even if proxy secret is undefined INTER-1158

[JuroUhlar]

• Proxy integration should send the other Fpjs-proxy-* headers even if the proxy secret is undefined. This allows the Fingerprint API to recognize the request as proxied and apply appropriate validation.
• Adjusted tests, making small improvements along the way:
  • Tests now check if pre-existing headers are preserved.
  • Tests now check if the value of the proxy secret header matches.
  • The "correct configuration" test case comes first.
  • "No proxy secret" test makes sure the secret is not defined in the Secret store. Previous code relied on the order of test cases to work.

[github-actions]

This PR will create a patch release 🚀

0.3.1 (2025-03-19)

Bug Fixes

• send other proxy headers even if proxy secret is undefined (5597be5)

[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🟡	Statements	74.26%	251/338
🟡	Branches	67.92%	72/106
🟡	Functions	79.73%	59/74
🟡	Lines	74.77%	249/333

Test suite run success

72 tests passing in 7 suites.

Report generated by 🧪jest coverage report action from 5597be5

Show full coverage report

St	File	% Stmts	% Branch	% Funcs	% Lines	Uncovered Line #s
🟡	All files	74.26	67.92	79.72	74.77
🟢	src	89.85	100	85.71	91.17
🟢	env.ts	90.24	100	85.71	90.24	74,81,93,100
🟢	handler.ts	100	100	100	100
🟡	index.ts	66.66	100	50	75	17-18
🟡	src/handlers	72.48	48.27	76.19	72.29
🟢	handleDownloadScript.ts	100	100	100	100
🟡	handleIngressAPI.ts	68.29	50	66.66	67.5	16,34-59
🟡	handleStatusPage.ts	71.13	47.61	76.92	71.13	66,83,94-119,136-138,146-152,233-235
🔴	index.ts	0	0	0	0
🟡	src/utils	67.5	85.71	78.12	68.37
🟢	addProxyIntegrationHeaders.ts	100	100	100	100
🟢	addTrafficMonitoring.ts	100	100	100	100
🔴	base64.ts	0	100	0	0	2-9
🟢	clientIp.ts	100	100	100	100
🔴	cloneFastlyResponse.ts	0	100	0	0	2
🟢	cookie.ts	100	100	100	100
🟢	createErrorResponse.ts	100	100	100	100
🟢	createRoute.ts	100	100	100	100
🔴	decrypt.ts	12.5	100	0	12.5	8-16
🟢	getIngressBackendByRegion.ts	100	100	100	100
🟢	getStore.ts	83.33	100	75	83.33	30-31
🔴	index.ts	0	0	0	0
🔴	processOpenClientResponse.ts	0	0	0	0	15-39
🟢	proxyEndpoint.ts	100	100	100	100
🟢	registerPlugin.ts	100	100	100	100
🟢	returnHttpResponse.ts	100	100	100	100
🔴	unsealData.ts	0	100	0	0	6-10

[fingerprint-dx-team]

🎉 This PR is included in version 0.3.1 🎉

The release is available on GitHub release

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