Secret sync for Render doesn't support secret referencing for more than 1 level

[ask4fusora]

Describe the bug

Secret sync for Render doesn't support secret referencing for more than 1 level.

What it looks like in local development

> phase secrets export --env Preview | from env | select LEVEL0 LEVEL1 LEVEL2
╭────────┬──────────────────────╮
│ LEVEL0 │ LEVEL0               │
│ LEVEL1 │ LEVEL0+LEVEL1        │
│ LEVEL2 │ LEVEL0+LEVEL1+LEVEL2 │
╰────────┴──────────────────────╯

What it looks like on Render secrets sync

To Reproduce

Steps to reproduce the behavior:

1. Create 3 levels of secret referencing.

3. Sync it with a service of Render.
4. See error.

Expected behavior

Render secrets sync should support recursive references.

Screenshots

Phase.dev setup

Local machine

What it looks like on Render

Platform you are having the issue on: Render

Additional context

Add any other context about the problem here.

[rohan-chaturvedi]

@ask4fusora Many thanks for the detailed and clear bug report! We have a larger set of improvements to reference resolution for syncs in #827, so I'll try and include a fix for this there.