fix: Add sdk_version and get the current value from version()

Author: gpeacock

src/c2pa/c2pa.py

@@ -316,7 +316,15 @@ def _handle_string_result(result: ctypes.c_void_p, check_error: bool = True) ->
     return py_string
 
 def sdk_version() -> str:
-    return "0.8.0"
+    """
+    Returns the c2pa-rs version string, e.g., "0.49.5".
+    """
+    vstr = version()
+    # Example: "c2pa-c/0.49.5 c2pa-rs/0.49.5"
+    for part in vstr.split():
+        if part.startswith("c2pa-rs/"):
+            return part.split("/", 1)[1]
+    return vstr  # fallback if not found
 
 def version() -> str:
     """Get the C2PA library version."""

tests/test_unit_tests.py

@@ -17,15 +17,15 @@
 import unittest
 from unittest.mock import mock_open, patch
 
-from c2pa import  Builder, C2paError as Error,  Reader, C2paSigningAlg as SigningAlg, C2paSignerInfo, Signer # load_settings_file
+from c2pa import  Builder, C2paError as Error,  Reader, C2paSigningAlg as SigningAlg, C2paSignerInfo, Signer, sdk_version # load_settings_file
 
 PROJECT_PATH = os.getcwd()
 
 testPath = os.path.join(PROJECT_PATH, "tests", "fixtures", "C.jpg")
 
 class TestC2paSdk(unittest.TestCase):
     def test_version(self):
-        self.assertIn("0.9.0", sdk_version())
+        self.assertIn("0.49.5", sdk_version())
 
 
 class TestReader(unittest.TestCase):