[INS-320] Cloudinary detector

[MuneebUllahKhan222]

Description:

This PR adds cloudinary detector. It detects cloudinary creds like cloud name, api key and api secret and verifies them.

Checklist:

• Tests passing (make test-community)?
• Lint passing (make lint this requires golangci-lint)?

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Note

Medium Risk
Adds a new detector that makes outbound HTTP requests to Cloudinary for credential verification; regex matching and multi-part combination logic can also impact false-positive/false-negative rates and performance.

Overview
Adds a new cloudinary detector that extracts Cloudinary cloudName, apiKey, and apiSecret from source text (including URL-style cloudinary://key:secret@name) and emits results as a combined RawV2 triple.

When verification is enabled, the detector performs a Basic Auth GET to api.cloudinary.com/v1_1/<cloudName>/usage to mark credentials as verified/invalid and records unexpected/transport errors as verification errors.

Registers the detector in the default detector list and introduces a new protobuf DetectorType_Cloudinary enum value, with unit + integration tests/benchmarks covering match behavior and verification paths.

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[amanfcp]

LGTM, just shared a concern which could lead to false negatives.

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

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[rosecodym]

🤠 for a new detector. I've created a backlog ticket to separate this codeownership.

[shahzadhaider1]

please resolve the conflicts