chore: adopt flate for kubernetes diffs (#1766)

Author: bo0tzz

.mise/config.toml

@@ -3,11 +3,11 @@ deno = "2.9.0"
 flux2 = "2.8.8"
 go = "1.26.4"
 "go:github.com/cloudnative-pg/cloudnative-pg/cmd/kubectl-cnpg" = "1.29.1"
+"go:github.com/home-operations/flate/cmd/flate" = "0.4.10"
 helm = "4.2.2"
 jq = "1.8.2"
 kubectl = "1.36.2"
 opentofu = "1.11.8"
-"pipx:flux-local" = "8.3.0"
 terragrunt = "1.0.4"
 usage = "3.5.3"
 uv = "0.11.24"
@@ -61,7 +61,7 @@ description = "Retrieve kubectl auth key"
 hide = true
 
 [tasks."kube:diff"]
-run = "flux-local diff hr --path ./kubernetes -A --branch-orig main"
+run = "flate diff hr --path ./kubernetes --base main --allow-missing-secrets"
 description = "Diff kubernetes helm releases"
 
 [tasks.fmt]

.mise/mise.lock

@@ -9,6 +9,15 @@ spec:
   filter:
     labels:
       - "preview"
+# Sample inputs so flate can render this ResourceSet offline (the live provider
+# resolves real inputs from the GitHub API). status is a subresource, so this is
+# dropped on apply and never reaches the cluster.
+status:
+  exportedInputs:
+    - id: "1"
+      author: example
+      branch: example-pr
+      sha: "0000000000000000000000000000000000000000"
 ---
 apiVersion: fluxcd.controlplane.io/v1
 kind: ResourceSetInputProvider
@@ -20,6 +29,11 @@ spec:
   url: https://github.com/immich-app/immich
   filter:
     includeBranch: "^main$"
+# Sample input for offline flate rendering; dropped on apply (status subresource).
+status:
+  exportedInputs:
+    - branch: main
+      sha: "0000000000000000000000000000000000000000"
 ---
 apiVersion: fluxcd.controlplane.io/v1
 kind: ResourceSetInputProvider
@@ -32,3 +46,8 @@ spec:
   filter:
     semver: ">=2.0.0"
     limit: 10
+# Sample input for offline flate rendering; dropped on apply (status subresource).
+status:
+  exportedInputs:
+    - tag: v2.0.0
+      sha: "0000000000000000000000000000000000000000"