fix(ci): reduce noise in CI output (#128)

- Filter flutter pub get package-listing lines (^[+~><] ) in pubGetLayer
- Filter build_runner compilation-progress lines (^\[) in setup() and CheckMocks()
- Add -q to git commit in CheckMocks to suppress "460 files changed" stats
- Wrap flutter test in Coverage, TestBackend, TestIntegration, TestSyncReliability
  to show only the summary line on success and full output on failure
- Apply same build_runner filter to scripts/check_mocks_fresh.sh for local runs

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

scripts/check_mocks_fresh.sh

@@ -5,7 +5,14 @@ set -euo pipefail
 cd "$(git rev-parse --show-toplevel)"
 
 echo "check-mocks: regenerating..."
-fvm flutter pub run build_runner build --delete-conflicting-outputs 2>&1
+tmp=$(mktemp)
+trap 'rm -f "$tmp"' EXIT
+if fvm flutter pub run build_runner build --delete-conflicting-outputs >"$tmp" 2>&1; then
+  grep -vE '^\[' "$tmp" || true
+else
+  cat "$tmp"
+  exit 1
+fi
 
 CHANGED=$(git diff --name-only -- '*.mocks.dart')
 if [ -n "$CHANGED" ]; then