feat(v0.3): Power-сервис на FSM — dev-mock кормит события, grace+durable-barrier

P7.2: service.rs оборачивает PowerFsm — D-Bus state/signals из FSM; apply_event
исполняет действия (эмит сигналов, фоновый grace-таймер, durable-barrier sync).
dev-mock SetAcc/SetIgnition/TriggerShutdown/AbortShutdown кормят входы FSM.
FSM: AccOff → AccChanged(false)+ShutdownImminent (сохранён walking-skeleton-регресс).
Integration: ShutdownImminent + abort. zbus → tokio-executor (default-features=false,
features=["tokio"]) — иначе tokio::spawn в хендлере паникует (async-io). test-integration
--test-threads=1 (тесты владеют одним именем на шине).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Signed-off-by: Alexander <akotenev2003@gmail.com>

Cargo.lock

@@ -165,17 +165,6 @@ dependencies = [
  "slab",
 ]
 
-[[package]]
-name = "async-fs"
-version = "2.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8034a681df4aed8b8edbd7fbe472401ecf009251c8b40556b304567052e294c5"
-dependencies = [
- "async-lock",
- "blocking",
- "futures-lite",
-]
-
 [[package]]
 name = "async-io"
 version = "2.6.0"
@@ -3885,6 +3874,16 @@ dependencies = [
  "serde_core",
 ]
 
+[[package]]
+name = "socket2"
+version = "0.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "52d1cfed4120b4d927bf7c0f86d2087a4a7d6027c906d9f9d525a80573b9be51"
+dependencies = [
+ "libc",
+ "windows-sys 0.60.2",
+]
+
 [[package]]
 name = "softbuffer"
 version = "0.4.8"
@@ -4209,11 +4208,14 @@ version = "1.52.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8fc7f01b389ac15039e4dc9531aa973a135d7a4135281b12d7c1bc79fd57fffe"
 dependencies = [
+ "bytes",
  "libc",
  "mio",
  "pin-project-lite",
  "signal-hook-registry",
+ "socket2",
  "tokio-macros",
+ "tracing",
  "windows-sys 0.61.2",
 ]
 
@@ -5441,15 +5443,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bb97012beadd29e654708a0fdb4c84bc046f537aecfde2c3ee0a9e4b4d48c725"
 dependencies = [
  "async-broadcast",
- "async-executor",
- "async-fs",
- "async-io",
- "async-lock",
  "async-process",
  "async-recursion",
- "async-task",
  "async-trait",
- "blocking",
  "enumflags2",
  "event-listener",
  "futures-core",
@@ -5463,6 +5459,7 @@ dependencies = [
  "serde_repr",
  "sha1",
  "static_assertions",
+ "tokio",
  "tracing",
  "uds_windows",
  "windows-sys 0.52.0",