fix: harden lifecycle transition compensation and regression coverage (#2995)

* fix(ecstore): honor transition worker configuration

* fix(ecstore): add transition queue backpressure metrics

* fix(ecstore): schedule transition compensation on enqueue pressure

* fix(ecstore): log transition compensation scheduling

* test(rustfs): add transition compensation fault-injection coverage

* test(rustfs): cover delete after transition compensation

* test(scanner): cover cleanup after transition compensation

* test(rustfs): extend compensation transition coverage

* test(scanner): cover backfill idempotency after compensation

* test(scanner): cover noncurrent expiry after compensation

* test(rustfs): cover versioned delete after compensation

* test(rustfs): cover delete marker lifecycle after compensation

* test(scanner): extend versioned lifecycle compensation coverage

* test(scanner): model versioned delete after compensation

* test(scanner): clarify modeled versioned delete helper

* refactor(ecstore): optimize transition enqueue hot path

* refactor(ecstore): centralize transition runtime constants

* style(ecstore): apply rustfmt for transition timeout helper

* fix(ilm): align queue-full metric semantics

* refactor(ecstore): unify immediate enqueue failure handling

* refactor(ecstore): reuse transition worker env constant

* ci(actions): update setup action inputs

.github/actions/setup/action.yml

@@ -58,13 +58,13 @@ runs:
     - name: Install protoc
       uses: arduino/setup-protoc@v3
       with:
-        version: "33.1"
+        version: "34.1"
         repo-token: ${{ inputs.github-token }}
 
     - name: Install flatc
-      uses: Nugine/setup-flatc@v1.2.4
+      uses: Nugine/setup-flatc@v1
       with:
-        version: "25.9.23"
+        version: "25.12.19"
 
     - name: Install Rust toolchain
       uses: dtolnay/rust-toolchain@stable