fix(cli): handle Docker SemVer build metadata in version parsing #5965 (#6024)

Description:
Corrects _parse_version to support Docker versions with SemVer build
metadata (e.g., 28.1.1+1), resolving #5965. Adds comprehensive unit
tests for version parsing, including normal, v-prefixed, prerelease,
build metadata, combined prerelease/build metadata, and edge cases with
missing components.

Issue:
Closes #5965

Dependencies:
None

---------

Co-authored-by: Sydney Runkle <54324534+sydney-runkle@users.noreply.github.com>

libs/cli/langgraph_cli/docker.py

@@ -40,7 +40,9 @@ def _parse_version(version: str) -> Version:
         patch = "0"
     else:
         major, minor, patch = parts
-    return Version(int(major.lstrip("v")), int(minor), int(patch.split("-")[0]))
+    return Version(
+        int(major.lstrip("v")), int(minor), int(patch.split("-")[0].split("+")[0])
+    )
 
 
 def check_capabilities(runner) -> DockerCapabilities:

libs/cli/tests/unit_tests/test_docker.py

@@ -1,7 +1,10 @@
+import pytest
+
 from langgraph_cli.docker import (
     DEFAULT_POSTGRES_URI,
     DockerCapabilities,
     Version,
+    _parse_version,
     compose,
 )
 from langgraph_cli.util import clean_empty_lines
@@ -363,3 +366,22 @@ services:
             REDIS_URI: redis://langgraph-redis:6379
             POSTGRES_URI: {DEFAULT_POSTGRES_URI}"""
     assert clean_empty_lines(actual_compose_str) == expected_compose_str
+
+
+@pytest.mark.parametrize(
+    "input_str,expected",
+    [
+        ("1.2.3", Version(1, 2, 3)),
+        ("v1.2.3", Version(1, 2, 3)),
+        ("1.2.3-alpha", Version(1, 2, 3)),
+        ("1.2.3+1", Version(1, 2, 3)),
+        ("1.2.3-alpha+build", Version(1, 2, 3)),
+        ("1.2", Version(1, 2, 0)),
+        ("1", Version(1, 0, 0)),
+        ("v28.1.1+1", Version(28, 1, 1)),
+        ("2.0.0-beta.1+exp.sha.5114f85", Version(2, 0, 0)),
+        ("v3.4.5-rc1+build.123", Version(3, 4, 5)),
+    ],
+)
+def test_parse_version_w_edge_cases(input_str, expected):
+    assert _parse_version(input_str) == expected