fix(release): per-binary archives + dist ignore

One archive can't span builds with different target sets (dash ships 6,
dash-agent 3) — split into two archives keyed by build id. Also: `builds`
is deprecated in goreleaser v2, renamed to `ids`. Snapshot validated
locally: 9 archives, checksums, embedded UI, migrations on boot.

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

.goreleaser.yaml

@@ -31,12 +31,18 @@ builds:
 
 archives:
   - id: dash
+    ids: [dash]
     formats: [tar.gz]
     name_template: "{{ .ProjectName }}_{{ .Os }}_{{ .Arch }}{{ with .Arm }}v{{ . }}{{ end }}"
     format_overrides:
       - goos: windows
         formats: [zip]
     files: [README.md, LICENSE]
+  - id: dash-agent
+    ids: [dash-agent]
+    formats: [tar.gz]
+    name_template: "{{ .ProjectName }}-agent_{{ .Os }}_{{ .Arch }}{{ with .Arm }}v{{ . }}{{ end }}"
+    files: [README.md, LICENSE]
 
 checksum:
   name_template: "checksums.txt"