GitCommit: include commit author/committer signatures

Author: pmrowla

src/scmrepo/git/backend/gitpython.py

@@ -398,6 +398,12 @@ def resolve_commit(self, rev: str) -> "GitCommit":
             commit.committer_tz_offset,
             commit.message,
             [str(parent) for parent in commit.parents],
+            commit.committer.name,
+            commit.committer.email,
+            commit.author.name,
+            commit.author.email,
+            commit.authored_date,
+            commit.author_tz_offset,
         )
 
     def set_ref(

src/scmrepo/git/backend/pygit2/__init__.py

@@ -387,6 +387,12 @@ def resolve_commit(self, rev: str) -> "GitCommit":
             commit.commit_time_offset,
             commit.message,
             [str(parent) for parent in commit.parent_ids],
+            commit.committer.name,
+            commit.committer.email,
+            commit.author.name,
+            commit.author.email,
+            commit.author.time,
+            commit.author.offset,
         )
 
     def _get_stash(self, ref: str):

src/scmrepo/git/objects.py

@@ -162,6 +162,12 @@ class GitCommit:
     commit_time_offset: int
     message: str
     parents: List[str]
+    committer_name: str
+    committer_email: str
+    author_name: str
+    author_email: str
+    author_time: int
+    author_time_offset: int
 
 
 @dataclass