fix: use absolute path for wasmtime WASI directory mapping

- Change --dir=. to --dir=$PWD_PATH for proper WASI sandbox access
- Fixes 'errno 2' file not found errors in regression detection
- WASI sandboxing requires explicit absolute paths for directory access
- Update both baseline and PR benchmark commands

Author: avrabe

.github/workflows/performance.yml

@@ -439,7 +439,8 @@ jobs:
 
         # Test wasmtime command first to ensure it works
         echo "Testing wasmtime command..."
-        wasmtime run --dir=. bazel-bin/tinygo/file_ops_component.wasm copy_file --src baseline_test.txt --dest baseline_copy.txt || {
+        PWD_PATH=$(pwd)
+        wasmtime run --dir=$PWD_PATH bazel-bin/tinygo/file_ops_component.wasm copy_file --src baseline_test.txt --dest baseline_copy.txt || {
           echo "ERROR: wasmtime command failed"
           exit 1
         }
@@ -451,7 +452,7 @@ jobs:
         hyperfine --export-json baseline_results/baseline_benchmark.json \
           --warmup 3 \
           --show-output \
-          'wasmtime run --dir=. bazel-bin/tinygo/file_ops_component.wasm copy_file --src baseline_test.txt --dest baseline_copy.txt'
+          "wasmtime run --dir=$PWD_PATH bazel-bin/tinygo/file_ops_component.wasm copy_file --src baseline_test.txt --dest baseline_copy.txt"
 
     - name: Checkout PR Branch
       run: |
@@ -464,7 +465,8 @@ jobs:
 
         # Test wasmtime command first
         echo "Testing wasmtime command on PR branch..."
-        wasmtime run --dir=. bazel-bin/tinygo/file_ops_component.wasm copy_file --src baseline_test.txt --dest pr_copy.txt || {
+        PWD_PATH=$(pwd)
+        wasmtime run --dir=$PWD_PATH bazel-bin/tinygo/file_ops_component.wasm copy_file --src baseline_test.txt --dest pr_copy.txt || {
           echo "ERROR: wasmtime command failed on PR branch"
           exit 1
         }
@@ -476,7 +478,7 @@ jobs:
         hyperfine --export-json pr_results/pr_benchmark.json \
           --warmup 3 \
           --show-output \
-          'wasmtime run --dir=. bazel-bin/tinygo/file_ops_component.wasm copy_file --src baseline_test.txt --dest pr_copy.txt'
+          "wasmtime run --dir=$PWD_PATH bazel-bin/tinygo/file_ops_component.wasm copy_file --src baseline_test.txt --dest pr_copy.txt"
 
     - name: Analyze Performance Regression
       run: |