test(pipelock): cut low-value tests (naming + entrypoint/cmd inspection)

Drops 6 tests with no real coverage loss:

- tests/test_pipelock_naming.py — 4 tests asserting that f-string
  format helpers return their f-string. Shape locks, not behavior
  gates.
- tests/test_pipelock_image.py:test_entrypoint_contains_pipelock and
  :test_cmd_contains_run — Docker image metadata inspection. The
  remaining test_binary_runs already covers 'does the pinned image
  actually work,' which is the only scenario these were really
  guarding against.

31 tests -> 25.

tests/test_pipelock_image.py

@@ -1,11 +1,7 @@
-"""Integration: verify the pinned pipelock image. Requires docker.
+"""Integration: the pinned pipelock image's binary actually runs.
-  - Pinned digest is reachable on the registry.
+Catches a broken upstream packaging at the pinned digest. Requires
-  - Image's ENTRYPOINT/CMD match what claude_bottle.pipelock assumes
+docker."""
-    (`/pipelock` and `run --listen 0.0.0.0:8888`).
-  - The /pipelock binary actually runs (--version succeeds)."""
 
-import json
-import re
 import subprocess
 import unittest
 
@@ -17,7 +13,6 @@ from tests._docker import skip_unless_docker
 class TestPipelockImage(unittest.TestCase):
     @classmethod
     def setUpClass(cls):
-        # Pull the pinned image (cheap if cached).
         result = subprocess.run(
             ["docker", "pull", PIPELOCK_IMAGE],
             stdout=subprocess.DEVNULL,
@@ -26,22 +21,6 @@ class TestPipelockImage(unittest.TestCase):
         if result.returncode != 0:
             raise unittest.SkipTest(f"could not pull {PIPELOCK_IMAGE}")
 
-    def test_entrypoint_contains_pipelock(self):
-        result = subprocess.run(
-            ["docker", "image", "inspect", PIPELOCK_IMAGE,
-             "--format", "{{json .Config.Entrypoint}}"],
-            capture_output=True, text=True,
-        )
-        self.assertIn("/pipelock", result.stdout)
-
-    def test_cmd_contains_run(self):
-        result = subprocess.run(
-            ["docker", "image", "inspect", PIPELOCK_IMAGE,
-             "--format", "{{json .Config.Cmd}}"],
-            capture_output=True, text=True,
-        )
-        self.assertIn("run", result.stdout)
-
     def test_binary_runs(self):
         result = subprocess.run(
             ["docker", "run", "--rm", PIPELOCK_IMAGE, "--version"],

tests/test_pipelock_naming.py

@@ -1,33 +0,0 @@
-"""Unit: pipelock naming helpers (container_name, proxy_url, proxy_host_port)."""
-
-import unittest
-
-from claude_bottle.pipelock import (
-    pipelock_container_name,
-    pipelock_proxy_host_port,
-    pipelock_proxy_url,
-)
-
-
-class TestPipelockNaming(unittest.TestCase):
-    def test_container_name_simple(self):
-        self.assertEqual("claude-bottle-pipelock-foo", pipelock_container_name("foo"))
-
-    def test_container_name_with_hyphens(self):
-        self.assertEqual(
-            "claude-bottle-pipelock-some-slug", pipelock_container_name("some-slug")
-        )
-
-    def test_proxy_url_default_port(self):
-        self.assertEqual(
-            "http://claude-bottle-pipelock-foo:8888", pipelock_proxy_url("foo")
-        )
-
-    def test_proxy_host_port_default_port(self):
-        self.assertEqual(
-            "claude-bottle-pipelock-foo:8888", pipelock_proxy_host_port("foo")
-        )
-
-
-if __name__ == "__main__":
-    unittest.main()