fix(linode): keep instance ipv6 addresses

[dogancanbakir]

Fixes #789

Strips the prefix length the API appends to ipv6, so instance IPv6 addresses are no longer rejected by the validator. Test uses the documented response format against a fake API.

Summary by CodeRabbit

• Bug Fixes
  • Linode instance IPv6 addresses are now displayed without the prefix-length suffix (for example, /128).

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ℹ️ Recent review info

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• Run ID: c908cbfd-63cd-4730-b997-baf78174737e

📥 Commits

Reviewing files that changed from the base of the PR and between f49f78d and e8529b0.

📒 Files selected for processing (2)

• pkg/providers/linode/instances.go
• pkg/providers/linode/instances_test.go

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Walkthrough

The Linode instance provider removes the prefix-length suffix from IPv6 addresses before setting PublicIPv6. A test checks an address with a /128 suffix.

Changes

Linode IPv6 Address Handling

Layer / File(s)	Summary
Normalize instance IPv6 addresses pkg/providers/linode/instances.go, pkg/providers/linode/instances_test.go	The provider strips the prefix-length suffix from instance IPv6 addresses. The test checks that PublicIPv6 contains the address without /128.

Priority: ➖ Normal

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix · Severity of issue fixed: Medium

Merge Risk: ⚪ Minimal · up to e8529

Linode instance IPv6 addresses are now returned without the prefix length, so they pass validation and appear in output. No merge-blocking risk was found.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 2 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: preserving Linode instance IPv6 addresses by removing the API-provided prefix length.
Linked Issues check	✅ Passed	Issue #789 requires the Linode instance IPv6 value to be usable in output when the API includes a prefix length. pkg/providers/linode/instances.go now removes the suffix after / before assigning `…
Out of Scope Changes check	✅ Passed	The pull request changes only Linode instance IPv6 normalization and its focused automated test. Both changes support issue #789. No unrelated behavior is changed.

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✨ Finishing Touches 💡 1

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_{A rabbit found an IPv6 trail,
Its /128 suffix lost its tail.
The address now comes through,
A test confirms it too.
Hop, hop, the fields are clear!}

_{Comment @coderabbitai help to get the list of available commands.}