ci: pin fastsync-ci:v11 with rsync 3.4.1 + acl/attr for parity tests

Add POSIX ACL/xattr tooling (acl, attr), zstd/lz4/xxhash dev libs and build rsync 3.4.1 from source so drop-in parity tests can run inside CI. Bump all workflow/agent image references v10 -> v11.

.gitea/workflows/ci.yaml

@@ -9,7 +9,7 @@ on:
 jobs:
   lint:
     runs-on: ubuntu-latest
-    container: gitea.tap-tap.win/taptap/fastsync-ci:v10
+    container: gitea.tap-tap.win/taptap/fastsync-ci:v11
     steps:
       - name: Checkout
         uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4
@@ -26,7 +26,7 @@ jobs:
   # suite) run on merge to dev/main, so PR CI stays well under ~3 minutes.
   build-and-test:
     runs-on: ubuntu-latest
-    container: gitea.tap-tap.win/taptap/fastsync-ci:v10
+    container: gitea.tap-tap.win/taptap/fastsync-ci:v11
     needs: lint
     steps:
       - name: Checkout
@@ -51,7 +51,7 @@ jobs:
 
   sanitizers:
     runs-on: ubuntu-latest
-    container: gitea.tap-tap.win/taptap/fastsync-ci:v10
+    container: gitea.tap-tap.win/taptap/fastsync-ci:v11
     needs: lint
     if: github.event_name == 'push'
     strategy:
@@ -72,7 +72,7 @@ jobs:
 
   fuzz-build:
     runs-on: ubuntu-latest
-    container: gitea.tap-tap.win/taptap/fastsync-ci:v10
+    container: gitea.tap-tap.win/taptap/fastsync-ci:v11
     needs: lint
     if: github.event_name == 'push'
     steps:
@@ -94,7 +94,7 @@ jobs:
 
   coverage:
     runs-on: ubuntu-latest
-    container: gitea.tap-tap.win/taptap/fastsync-ci:v10
+    container: gitea.tap-tap.win/taptap/fastsync-ci:v11
     needs: lint
     if: github.event_name == 'push'
     steps:
@@ -118,7 +118,7 @@ jobs:
 
   valgrind:
     runs-on: ubuntu-latest
-    container: gitea.tap-tap.win/taptap/fastsync-ci:v10
+    container: gitea.tap-tap.win/taptap/fastsync-ci:v11
     needs: lint
     if: github.event_name == 'push'
     steps: