fix(audit): gracefully handle malformed response (#32234)
Fixes an issue where `deno audit` fails to deserialize npm registry
responses when the `actions` field is missing.
## Changes Made
- Added `#[serde(default)]` attribute to the `actions` field in
`AuditResponse` struct in `cli/tools/pm/audit.rs` - this makes the field
default to an empty `Vec` when missing from the JSON response
- Added a unit test to verify the deserialization works when `actions`
field is missing
## Fix Details
The issue was that the npm registry audit API response sometimes doesn't
include the `actions` field. The Deno audit code was expecting this
field to always be present, causing deserialization to fail with:
`missing field 'actions' at line 1 column 33`
The fix adds `#[serde(default)]` to the `actions` field, which makes it
default to an empty vector when the field is not present in the JSON
response. This is the standard serde pattern for optional fields that
should have a sensible default value.
<!-- START COPILOT ORIGINAL PROMPT -->
<details>
<summary>Original prompt</summary>
>
> ----
>
> *This section details on the original issue you should resolve*
>
> <issue_title>`deno audit` fails to deserialize npm registry
response</issue_title>
> <issue_description>Version: Deno 2.6.10
>
> error: Failed to deserialize response from the npm registry API
>
> Caused by:
> missing field `actions` at line 1 column 33</issue_description>
>
> <agent_instructions>Update `AuditResponse` struct to have `actions`
field be optional and default to empty vector. Add a test case for it,
you can update test server in
`tests/util/server/servers/npm_registry.rs` with relevant
fixutre</agent_instructions>
>
> ## Comments on the Issue (you are @copilot in this section)
>
> <comments>
> </comments>
>
</details>
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- Fixes denoland/deno#32233
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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: bartlomieju <13602871+bartlomieju@users.noreply.github.com>
Co-authored-by: Bartek Iwańczuk <biwanczuk@gmail.com>
Co-authored-by: dsherret <1609021+dsherret@users.noreply.github.com>
