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Jordi Enric c228ca4f61 fix(studio): restore function deployment annotations FE-3921 (#50362)
## Problem

The Edge Function overview converted the numeric deployment timestamp to
a string before parsing it as a date. This produced an invalid date, so
the invocations chart omitted the deployment annotation.

## Fix

Preserve the numeric timestamp returned by the API and allow the
annotation helper to parse both numeric and string timestamps. Show
deployment details in an accessible tooltip when hovering or focusing
the rocket marker, and add regression coverage for numeric timestamps
and the existing invalid, missing, and out-of-range cases.

## How to test

- Run the focused EdgeFunctionOverview utility test suite.
- Open an Edge Function whose latest deployment is within the selected
chart interval.
- Hover or focus the rocket marker.
- Expected result: the invocations chart shows the dashed deployment
line and rocket marker, and the marker tooltip shows the deployment
time.

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

- **Bug Fixes**
- Invocation update annotations now display correctly when function
update times are provided as numbers.
  - Timestamps at the start of the Unix epoch are now supported.
- Annotations no longer appear when update times are invalid or chart
data is incomplete.

- **Accessibility**
- Deployment markers in invocation charts are now keyboard-focusable and
include accessible labels.
  - Deployment timestamps are available in a tooltip on hover or focus.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
2026-09-15 12:04:15 +02:00
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