Fix dagger call hanging in mise tasks on interactive terminals (#256)

## Summary

- Add `--progress=plain` to all `dagger call` invocations in mise tasks to prevent SIGTTOU hangs

## Root cause

Mise runs task scripts in a child process group that is not the terminal's foreground group. When `dagger call` detects a TTY (inherited from the interactive shell), it tries to render its TUI progress display, which requires terminal ioctls. Since the process is not in the foreground group, the kernel sends SIGTTOU, stopping the process indefinitely.

This only manifests when running from an interactive terminal (e.g. `pre-commit run --all-files` in fish/wezterm). CI and piped contexts are unaffected since there's no TTY.

## Changes

- `mise-tasks/validate-workflows` — add `--progress=plain`
- `mise-tasks/frigate-export-model` — add `--progress=plain`
- `mise-tasks/provision-ringtail` — add `--progress=plain`

## Test plan

- [x] `pre-commit run --all-files` completes without hanging
- [ ] Verify in interactive fish/wezterm terminal

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Reviewed-on: https://forge.ops.eblu.me/eblume/blumeops/pulls/256

mise-tasks/validate-workflows

@@ -3,4 +3,4 @@
 
 set -euo pipefail
 
-dagger call validate-workflows --src=.
+dagger call --progress=plain validate-workflows --src=.