Stage 2: TerdutTeam (create, mint team credential, rename/oidc-groups, delete)

Implements ROADMAP.md Stage 2 against terdut-server's now-real
GET /api/teams?name= (TEAM-LOOKUP.md, landed in terdut-server just
before this commit) -- without it, the adopt-on-409 pattern this
controller depends on for team creation had no server-side lookup to
call, the same gap TerdutServer's own bootstrap flow hit and fixed in
Stage 1.

- api/v1alpha1: TerdutTeamSpec per DESIGN.md §4.2 (serverRef, displayName,
  oidc). status.credentialsSecretRef drops namespace for key, matching
  the fix already applied to TerdutServer's.
- internal/controller:
  - terdutteam_controller.go: resolves serverRef (same-namespace by
    default; cross-namespace gated by the target TerdutServer's
    spec.allowedTeams, DESIGN.md §4.6), waits for that TerdutServer to be
    Bootstrapped (no cross-controller RPC -- reads its
    status.credentialsSecretRef directly, DESIGN.md §5), creates the team
    and mints its team-scoped credential using the TerdutServer's
    instance-scoped one, then applies rename/oidc-groups with the
    team-scoped credential every reconcile (both are idempotent PUTs of
    the whole resource -- applied unconditionally rather than diffed
    against a stored last-applied value, same "cheap because it's small"
    reasoning §5 already gives the escalation policy's whole-policy PUT).
  - terdutteam_allowedteams.go: the §4.6 consent check in isolation from
    any client, unit-tested directly against hand-built inputs.
  - terdutteam_bootstrap.go: create-or-adopt-on-409 for the team itself
    (via TEAM-LOOKUP.md) and for its team-scoped service account (via the
    same GET-by-name+mint-new-key pattern Stage 1 already uses for the
    instance account).
  - secrets.go: extracted TerdutServer's write/read-credential-Secret
    helpers into free functions, now shared by both controllers rather
    than duplicated.
  - Finalizer deletes the team server-side (owner-gated, needs the
    team-scoped credential -- confirmed against source that an
    instance-scoped one does not satisfy requireTeamOwner, same finding
    as TEAM-LOOKUP.md's) and cleans up its credentials Secret. A team
    created but never fully reconciled to Ready (no team-scoped
    credential ever minted) is left orphaned server-side on delete -- a
    known, documented limitation (terdut-server has no delete path that
    doesn't require owner-equivalent access), not a silent gap.
- internal/tdclient: Team type, CreateTeam, GetTeamByName, RenameTeam,
  DeleteTeam, SetTeamOIDCGroups, CreateTeamServiceAccount -- matching
  terdut-server's real handlers' shapes field-for-field, same as Stage
  1's client additions.
- Tests: envtest covering the happy path, both not-ready reasons
  (ServerRefNotFound, WaitingForServer), cross-namespace allow/deny
  (default-closed and explicit All), both adopt-on-409 paths (team
  itself, team-scoped service account), and deletion. Extended the shared
  fakeTerdutServer (Stage 1) with team endpoints rather than writing a
  second, separately-drifting fake. 72.8%/30.6% coverage, 0 lint issues.

Verified locally: make fmt lint test build all clean.

api/v1alpha1/zz_generated.deepcopy.go

@@ -264,6 +264,21 @@ func (in *TerdutServerList) DeepCopyObject() runtime.Object {
 	return nil
 }
 
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *TerdutServerRef) DeepCopyInto(out *TerdutServerRef) {
+	*out = *in
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new TerdutServerRef.
+func (in *TerdutServerRef) DeepCopy() *TerdutServerRef {
+	if in == nil {
+		return nil
+	}
+	out := new(TerdutServerRef)
+	in.DeepCopyInto(out)
+	return out
+}
+
 // 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
@@ -313,3 +328,121 @@ func (in *TerdutServerStatus) DeepCopy() *TerdutServerStatus {
 	in.DeepCopyInto(out)
 	return out
 }
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *TerdutTeam) DeepCopyInto(out *TerdutTeam) {
+	*out = *in
+	out.TypeMeta = in.TypeMeta
+	in.ObjectMeta.DeepCopyInto(&out.ObjectMeta)
+	out.Spec = in.Spec
+	in.Status.DeepCopyInto(&out.Status)
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new TerdutTeam.
+func (in *TerdutTeam) DeepCopy() *TerdutTeam {
+	if in == nil {
+		return nil
+	}
+	out := new(TerdutTeam)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyObject is an autogenerated deepcopy function, copying the receiver, creating a new runtime.Object.
+func (in *TerdutTeam) 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 *TerdutTeamList) DeepCopyInto(out *TerdutTeamList) {
+	*out = *in
+	out.TypeMeta = in.TypeMeta
+	in.ListMeta.DeepCopyInto(&out.ListMeta)
+	if in.Items != nil {
+		in, out := &in.Items, &out.Items
+		*out = make([]TerdutTeam, len(*in))
+		for i := range *in {
+			(*in)[i].DeepCopyInto(&(*out)[i])
+		}
+	}
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new TerdutTeamList.
+func (in *TerdutTeamList) DeepCopy() *TerdutTeamList {
+	if in == nil {
+		return nil
+	}
+	out := new(TerdutTeamList)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyObject is an autogenerated deepcopy function, copying the receiver, creating a new runtime.Object.
+func (in *TerdutTeamList) 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 *TerdutTeamOIDC) DeepCopyInto(out *TerdutTeamOIDC) {
+	*out = *in
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new TerdutTeamOIDC.
+func (in *TerdutTeamOIDC) DeepCopy() *TerdutTeamOIDC {
+	if in == nil {
+		return nil
+	}
+	out := new(TerdutTeamOIDC)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *TerdutTeamSpec) DeepCopyInto(out *TerdutTeamSpec) {
+	*out = *in
+	out.ServerRef = in.ServerRef
+	out.OIDC = in.OIDC
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new TerdutTeamSpec.
+func (in *TerdutTeamSpec) DeepCopy() *TerdutTeamSpec {
+	if in == nil {
+		return nil
+	}
+	out := new(TerdutTeamSpec)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *TerdutTeamStatus) DeepCopyInto(out *TerdutTeamStatus) {
+	*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 TerdutTeamStatus.
+func (in *TerdutTeamStatus) DeepCopy() *TerdutTeamStatus {
+	if in == nil {
+		return nil
+	}
+	out := new(TerdutTeamStatus)
+	in.DeepCopyInto(out)
+	return out
+}