Improve vue:build with a retry detection on missing path

[tzi]

Description

vue:build is a bit flaky in CI and it's always the same error:

   error  in /home/runner/work/matomo/matomo/plugins/Installation/vue/src/SystemCheck/SystemCheck.vue.ts

  [tsl] ERROR in /home/runner/work/matomo/matomo/plugins/Installation/vue/src/SystemCheck/SystemCheck.vue(48,31)
        TS2307: Cannot find module './SystemCheckLegend.vue' or its corresponding type declarations.

   error  in /home/runner/work/matomo/matomo/plugins/Installation/vue/src/SystemCheck/SystemCheckSection.vue.ts

  [tsl] ERROR in /home/runner/work/matomo/matomo/plugins/Installation/vue/src/SystemCheck/SystemCheckSection.vue(86,29)
        TS2307: Cannot find module './DiagnosticTable.vue' or its corresponding type declarations.

This is certainly a compiler race/flakiness.

We can fixed it with a retry detection in Build.php:

• Before, Matomo only detected TS2307 race for very limited patterns.
• It missed relative-import TS2307 cases like your Installation ones.
• Now it parses TS2307 with importer file context and correctly treats existing relative targets as transient, so vue:build retries automatically instead of failing CI immediately.

Checklist

• [✔] I have understood, reviewed, and tested all AI outputs before use
• [✔] All AI instructions respect security, IP, and privacy rules

Review

• Functional review done
• Potential edge cases thought about (behaviour of the code with strange input, with strange internal state or possible interactions with other Matomo subsystems)
• Usability review done (is anything maybe unclear or think about anything that would cause people to reach out to support)
• Security review done
• Wording review done
• Code review done
• Tests were added if useful/possible
• Reviewed for breaking changes
• Developer changelog updated if needed
• New documentation added or existing documentation updated

[tzi]

✅ Tested 5 times without any error

[sgiehl]

Looks like it would improve things. Let's see if things get better that way.