./install.sh failure: install/dc-detect-version.sh

### Self-Hosted Version

26.7.0

### CPU Architecture

x86_64

### Docker Version

28.1.1, build 4eba377

### Docker Compose Version

v2.35.1

### Machine Specification

- [x] My system meets the minimum system requirements of Sentry

### Installation Type

Upgrade from 26.5.0

### Steps to Reproduce

1. Run `sudo ./install.sh`

### Expected Result

Successful install

### Actual Result

```
container sentry-self-hosted-seaweedfs-1 is unhealthy
Error in install/dc-detect-version.sh:89.
'$dc up --wait "${options[@]}" "${services[@]}"' exited with status 1
-> ./install.sh:main:40
--> install/bootstrap-s3-nodestore.sh:source:3
---> install/dc-detect-version.sh:start_service_and_wait_ready:89

Looks like you've already sent this error to us, we're on it :)
install/dc-detect-version.sh: line 3: pop_var_context: head of shell_variables not a function context
```

### Event ID

_No response_

Start by running the reported upgrade with sudo ./install.sh and inspect install/dc-detect-version.sh around line 89, where the service wait fails. Check install/bootstrap-s3-nodestore.sh and the sentry-self-hosted-seaweedfs-1 health result to identify the failure. Done means the upgrade completes successfully without the unhealthy-service or shell error.

Written by the indexing model from the issue text.