fix(cli): ensure git committer identity during ktx setup (#276)

* fix(cli): ensure git committer identity during ktx setup

ktx setup threw "Failed to initialize git repository" when the project
directory was already a git repo with no commits and the machine had no
configured git identity (e.g. a fresh Mac with no ~/.gitconfig).
GitService only set the identity on the path where it created the repo
itself, so the bootstrap commit had no resolvable committer.

Carry ktx's identity via GIT_AUTHOR/GIT_COMMITTER env on the shared
git client so every commit succeeds regardless of whether ktx created
the repo, without mutating the user's repo config. Also preserve the
underlying git error when rethrowing so the failure is diagnosable in
telemetry and actionable for the user.

* chore: sync uv.lock ktx-daemon and ktx-sl versions to 0.10.0

uv.lock

@@ -466,7 +466,7 @@ wheels = [
 
 [[package]]
 name = "ktx-daemon"
-version = "0.9.0"
+version = "0.10.0"
 source = { editable = "python/ktx-daemon" }
 dependencies = [
     { name = "fastapi" },
@@ -523,7 +523,7 @@ dev = [
 
 [[package]]
 name = "ktx-sl"
-version = "0.9.0"
+version = "0.10.0"
 source = { editable = "python/ktx-sl" }
 dependencies = [
     { name = "pydantic" },