Stage 1: TerdutServer, bring-your-own bootstrap credentials

Implements the narrowed Stage 1 scope from ROADMAP.md, against the
bootstrap-flow fix from DESIGN.md §4.1/§6 (the earlier self-registration
flow couldn't work unauthenticated against terdut-server's real
AuthMiddleware -- see that commit for the full trace).

- api/v1alpha1: TerdutServer with spec.endpoint + spec.credentialsSecretRef
  + spec.allowedTeams (image/replicas/networking/database deferred to
  Stage 5, per DESIGN.md's own narrowing). SecretKeyRef has no namespace
  field -- always the operator's own, by construction.
- internal/controller: TerdutServerReconciler implements exactly the
  bring-your-own path -- adopt spec.credentialsSecretRef if the Secret
  exists and has data under the given key, probe GET /api/version as a
  reachability check, set Ready/Bootstrapped conditions accordingly.
  Self-registration (the /api/bootstrap race) is not implemented; unset
  spec.credentialsSecretRef reports Ready: False, reason:
  CredentialsSecretRefRequired, not an attempt at a flow that would fail
  unauthenticated anyway. No finalizer: this stage creates nothing
  server-side and adopts rather than generates its Secret, so there's
  nothing to clean up on delete yet.
- internal/tdclient: minimal terdut-server API client (Version only, the
  one call this stage needs), styled after terdut-tui's own
  internal/api/client.go per terdut/CLAUDE.md's mirroring convention.
- Tests: envtest suite covering all four not-ready paths plus the happy
  path (fake terdut-server via httptest.Server, per DESIGN.md §11), and a
  focused unit suite for tdclient. 75.6%/82.4% coverage.
- Event recording uses the new events.k8s.io/v1 recorder API
  (mgr.GetEventRecorder), not the deprecated GetEventRecorderFor --
  caught by golangci-lint's staticcheck before it shipped.

Verified locally: make fmt lint test build all clean, 0 lint issues, all
specs pass.

api/v1alpha1/zz_generated.deepcopy.go

@@ -0,0 +1,168 @@
+//go:build !ignore_autogenerated
+
+// Code generated by controller-gen. DO NOT EDIT.
+
+package v1alpha1
+
+import (
+	"k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+)
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *AllowedTeams) DeepCopyInto(out *AllowedTeams) {
+	*out = *in
+	in.Namespaces.DeepCopyInto(&out.Namespaces)
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new AllowedTeams.
+func (in *AllowedTeams) DeepCopy() *AllowedTeams {
+	if in == nil {
+		return nil
+	}
+	out := new(AllowedTeams)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *AllowedTeamsNamespaces) DeepCopyInto(out *AllowedTeamsNamespaces) {
+	*out = *in
+	if in.Selector != nil {
+		in, out := &in.Selector, &out.Selector
+		*out = new(v1.LabelSelector)
+		(*in).DeepCopyInto(*out)
+	}
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new AllowedTeamsNamespaces.
+func (in *AllowedTeamsNamespaces) DeepCopy() *AllowedTeamsNamespaces {
+	if in == nil {
+		return nil
+	}
+	out := new(AllowedTeamsNamespaces)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *SecretKeyRef) DeepCopyInto(out *SecretKeyRef) {
+	*out = *in
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new SecretKeyRef.
+func (in *SecretKeyRef) DeepCopy() *SecretKeyRef {
+	if in == nil {
+		return nil
+	}
+	out := new(SecretKeyRef)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *TerdutServer) DeepCopyInto(out *TerdutServer) {
+	*out = *in
+	out.TypeMeta = in.TypeMeta
+	in.ObjectMeta.DeepCopyInto(&out.ObjectMeta)
+	in.Spec.DeepCopyInto(&out.Spec)
+	in.Status.DeepCopyInto(&out.Status)
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new TerdutServer.
+func (in *TerdutServer) DeepCopy() *TerdutServer {
+	if in == nil {
+		return nil
+	}
+	out := new(TerdutServer)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyObject is an autogenerated deepcopy function, copying the receiver, creating a new runtime.Object.
+func (in *TerdutServer) DeepCopyObject() runtime.Object {
+	if c := in.DeepCopy(); c != nil {
+		return c
+	}
+	return nil
+}
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *TerdutServerList) DeepCopyInto(out *TerdutServerList) {
+	*out = *in
+	out.TypeMeta = in.TypeMeta
+	in.ListMeta.DeepCopyInto(&out.ListMeta)
+	if in.Items != nil {
+		in, out := &in.Items, &out.Items
+		*out = make([]TerdutServer, len(*in))
+		for i := range *in {
+			(*in)[i].DeepCopyInto(&(*out)[i])
+		}
+	}
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new TerdutServerList.
+func (in *TerdutServerList) DeepCopy() *TerdutServerList {
+	if in == nil {
+		return nil
+	}
+	out := new(TerdutServerList)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyObject is an autogenerated deepcopy function, copying the receiver, creating a new runtime.Object.
+func (in *TerdutServerList) DeepCopyObject() runtime.Object {
+	if c := in.DeepCopy(); c != nil {
+		return c
+	}
+	return nil
+}
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *TerdutServerSpec) DeepCopyInto(out *TerdutServerSpec) {
+	*out = *in
+	if in.CredentialsSecretRef != nil {
+		in, out := &in.CredentialsSecretRef, &out.CredentialsSecretRef
+		*out = new(SecretKeyRef)
+		**out = **in
+	}
+	in.AllowedTeams.DeepCopyInto(&out.AllowedTeams)
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new TerdutServerSpec.
+func (in *TerdutServerSpec) DeepCopy() *TerdutServerSpec {
+	if in == nil {
+		return nil
+	}
+	out := new(TerdutServerSpec)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *TerdutServerStatus) DeepCopyInto(out *TerdutServerStatus) {
+	*out = *in
+	if in.Conditions != nil {
+		in, out := &in.Conditions, &out.Conditions
+		*out = make([]v1.Condition, len(*in))
+		for i := range *in {
+			(*in)[i].DeepCopyInto(&(*out)[i])
+		}
+	}
+	if in.CredentialsSecretRef != nil {
+		in, out := &in.CredentialsSecretRef, &out.CredentialsSecretRef
+		*out = new(SecretKeyRef)
+		**out = **in
+	}
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new TerdutServerStatus.
+func (in *TerdutServerStatus) DeepCopy() *TerdutServerStatus {
+	if in == nil {
+		return nil
+	}
+	out := new(TerdutServerStatus)
+	in.DeepCopyInto(out)
+	return out
+}