[AZ-640] Bootstrap Rust workspace, CI/Docker, observability scaffold

Lands the first task of the implementation epic AZ-626: a cargo workspace
with 14 crates (shared + autopilot binary + 12 component crates), a
multi-stage Dockerfile + dev/test compose stacks, a Woodpecker CI pipeline,
the on-airframe systemd unit with flight-gate wiring, three environment
TOML configs, and the canonical entity catalogue from data_model.md as
`shared::models`.

Per-AC verification (full detail in
_docs/03_implementation/batch_01_cycle1_report.md):

- AC-1 cargo check --workspace clean
- AC-2 cargo test --workspace passes; per-crate it_compiles() <0.01 s
- AC-6 cargo build/test --no-default-features clean; VlmClient default
       impl returns VlmAssessment::disabled()
- AC-9 tracing-subscriber emits JSON logs with ts/level/target/fields
- AC-10 runtime::ensure_state_directories creates mapobjects/, audit/,
        pending_pushes/ under storage.state_dir

Deferred to external infra (artifacts written, verification re-runs in CI
and in downstream tasks):
- AC-3 Woodpecker runner; CI yml in place
- AC-4 docker-compose mocks land with AZ-660/AZ-644/AZ-675
- AC-5 SITL conformance lands with AZ-641/AZ-648/AZ-652
- AC-7 aarch64 cross-compile via cargo-zigbuild stage
- AC-8 systemd unit (Linux + systemd host)

Layering invariants from module-layout.md hold: shared (L1) imports
nothing; Layer 2 actor crates import only shared; Layer 3 coordinators
(operator_bridge, mission_executor) import only their documented Layer 2
deps; Layer 4 (scan_controller) imports its documented Layer 2 + Layer 3
deps; the autopilot binary (L5) is the only consumer of every component.

cargo fmt --all --check + cargo clippy --all-targets -- -D warnings both
clean. Jira AZ-640 transitioned to In Progress at the start of this batch;
the matching In Testing transition follows this commit.

Co-authored-by: Cursor <cursoragent@cursor.com>

crates/mission_executor/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "mission_executor"
+version = "0.1.0"
+edition.workspace = true
+rust-version.workspace = true
+license.workspace = true
+publish.workspace = true
+authors.workspace = true
+
+[dependencies]
+shared = { workspace = true }
+mavlink_layer = { workspace = true }
+mission_client = { workspace = true }
+mapobjects_store = { workspace = true }
+tokio = { workspace = true }
+tracing = { workspace = true }
+serde = { workspace = true }

crates/mission_executor/src/lib.rs

@@ -0,0 +1,105 @@
+//! `mission_executor` — multirotor + fixed-wing FSMs, geofence, failsafe.
+//!
+//! Real implementation lands in:
+//! - AZ-648 `mission_executor_state_machine`
+//! - AZ-649 `mission_executor_telemetry_forwarding`
+//! - AZ-650 `mission_executor_bit_f9`
+//! - AZ-651 `mission_executor_lost_link_ladder`
+//! - AZ-652 `mission_executor_safety_and_resume`
+
+use serde::{Deserialize, Serialize};
+
+use shared::error::{AutopilotError, Result};
+use shared::health::ComponentHealth;
+use shared::models::mission::{Coordinate, MissionItem};
+
+const NAME: &str = "mission_executor";
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(rename_all = "SCREAMING_SNAKE_CASE")]
+pub enum ExecutorState {
+    Disconnected,
+    PreFlight,
+    Taxi,
+    Climb,
+    Cruise,
+    MiddleWaypointInsert,
+    TargetFollow,
+    Rtl,
+    Land,
+    WaitAuto,
+    Aborted,
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(rename_all = "snake_case")]
+pub enum FailsafeKind {
+    LinkDegraded,
+    LinkLost,
+    LinkLostInFollow,
+    BatteryRtl,
+    BatteryHardFloor,
+    GeofenceInclusion,
+    GeofenceExclusion,
+}
+
+pub struct MissionExecutor;
+
+impl MissionExecutor {
+    pub fn new() -> Self {
+        Self
+    }
+
+    pub fn handle(&self) -> MissionExecutorHandle {
+        MissionExecutorHandle
+    }
+}
+
+impl Default for MissionExecutor {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+#[derive(Clone, Copy)]
+pub struct MissionExecutorHandle;
+
+impl MissionExecutorHandle {
+    pub async fn start(&self, _mission: Vec<MissionItem>) -> Result<()> {
+        Err(AutopilotError::NotImplemented(
+            "mission_executor::start (AZ-648)",
+        ))
+    }
+
+    pub async fn insert_middle_waypoint(&self, _at: Coordinate) -> Result<()> {
+        Err(AutopilotError::NotImplemented(
+            "mission_executor::insert_middle_waypoint (AZ-652)",
+        ))
+    }
+
+    pub async fn failsafe_trigger(&self, _kind: FailsafeKind) -> Result<()> {
+        Err(AutopilotError::NotImplemented(
+            "mission_executor::failsafe_trigger (AZ-651)",
+        ))
+    }
+
+    pub fn state(&self) -> ExecutorState {
+        ExecutorState::Disconnected
+    }
+
+    pub fn health(&self) -> ComponentHealth {
+        ComponentHealth::disabled(NAME)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn it_compiles() {
+        let h = MissionExecutor::new().handle();
+        assert_eq!(h.state(), ExecutorState::Disconnected);
+        assert_eq!(h.health().level, shared::health::HealthLevel::Disabled);
+    }
+}