feat: add plan step

Signed-off-by: kjuulh <contact@kjuulh.io>

crates/forage-grpc/src/grpc/forest/v1/forest.v1.rs

@@ -654,13 +654,28 @@ pub struct GetPlanOutputRequest {
     #[prost(string, tag="2")]
     pub stage_id: ::prost::alloc::string::String,
 }
-#[derive(Clone, PartialEq, Eq, Hash, ::prost::Message)]
+#[derive(Clone, PartialEq, ::prost::Message)]
 pub struct GetPlanOutputResponse {
+    /// deprecated: use outputs
     #[prost(string, tag="1")]
     pub plan_output: ::prost::alloc::string::String,
     /// RUNNING, AWAITING_APPROVAL, APPROVED, REJECTED
     #[prost(string, tag="2")]
     pub status: ::prost::alloc::string::String,
+    #[prost(message, repeated, tag="3")]
+    pub outputs: ::prost::alloc::vec::Vec<PlanDestinationOutput>,
+}
+#[derive(Clone, PartialEq, Eq, Hash, ::prost::Message)]
+pub struct PlanDestinationOutput {
+    #[prost(string, tag="1")]
+    pub destination_id: ::prost::alloc::string::String,
+    #[prost(string, tag="2")]
+    pub destination_name: ::prost::alloc::string::String,
+    #[prost(string, tag="3")]
+    pub plan_output: ::prost::alloc::string::String,
+    /// SUCCEEDED, FAILED, RUNNING, etc.
+    #[prost(string, tag="4")]
+    pub status: ::prost::alloc::string::String,
 }
 #[derive(Clone, PartialEq, Eq, Hash, ::prost::Message)]
 pub struct Source {
@@ -2813,7 +2828,7 @@ pub struct PolicyEvaluation {
     #[prost(string, tag="4")]
     pub reason: ::prost::alloc::string::String,
     #[prost(message, optional, tag="10")]
-    pub approval_state: ::core::option::Option<ExternalApprovalState>,
+    pub external_approval_state: ::core::option::Option<ExternalApprovalState>,
 }
 // ── CRUD messages ───────────────────────────────────────────────────
 
@@ -3404,6 +3419,9 @@ pub struct WorkAssignment {
     /// Full destination configuration including metadata.
     #[prost(message, optional, tag="6")]
     pub destination: ::core::option::Option<DestinationInfo>,
+    /// Execution mode. Defaults to DEPLOY if unset.
+    #[prost(enumeration="ReleaseMode", tag="7")]
+    pub mode: i32,
 }
 /// Destination configuration sent with the work assignment.
 #[derive(Clone, PartialEq, ::prost::Message)]
@@ -3526,10 +3544,47 @@ pub struct CompleteReleaseRequest {
     /// Error description when outcome is FAILURE.
     #[prost(string, tag="3")]
     pub error_message: ::prost::alloc::string::String,
+    /// Plan output text when mode was "plan" and outcome is SUCCESS.
+    /// Stored in release_states.plan_output for UI review.
+    #[prost(string, optional, tag="4")]
+    pub plan_output: ::core::option::Option<::prost::alloc::string::String>,
 }
 #[derive(Clone, Copy, PartialEq, Eq, Hash, ::prost::Message)]
 pub struct CompleteReleaseResponse {
 }
+/// Execution mode for a work assignment.
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, PartialOrd, Ord, ::prost::Enumeration)]
+#[repr(i32)]
+pub enum ReleaseMode {
+    Unspecified = 0,
+    /// Normal deployment execution.
+    Deploy = 1,
+    /// Dry-run / plan only (e.g. terraform plan). Runner should capture
+    /// plan output and include it in CompleteRelease.plan_output.
+    Plan = 2,
+}
+impl ReleaseMode {
+    /// String value of the enum field names used in the ProtoBuf definition.
+    ///
+    /// The values are not transformed in any way and thus are considered stable
+    /// (if the ProtoBuf definition does not change) and safe for programmatic use.
+    pub fn as_str_name(&self) -> &'static str {
+        match self {
+            Self::Unspecified => "RELEASE_MODE_UNSPECIFIED",
+            Self::Deploy => "RELEASE_MODE_DEPLOY",
+            Self::Plan => "RELEASE_MODE_PLAN",
+        }
+    }
+    /// Creates an enum from field names used in the ProtoBuf definition.
+    pub fn from_str_name(value: &str) -> ::core::option::Option<Self> {
+        match value {
+            "RELEASE_MODE_UNSPECIFIED" => Some(Self::Unspecified),
+            "RELEASE_MODE_DEPLOY" => Some(Self::Deploy),
+            "RELEASE_MODE_PLAN" => Some(Self::Plan),
+            _ => None,
+        }
+    }
+}
 #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, PartialOrd, Ord, ::prost::Enumeration)]
 #[repr(i32)]
 pub enum ReleaseOutcome {