Preserve absolute UDS paths in `parse_maddr()`

Drop the `.lstrip('/')` on the unix protocol value
so the lib-prepended `/` restores the absolute-path
semantics that `mk_maddr()` strips when encoding.
Pass `Path` components (not `str`) to `UDSAddress`.

Also, update all UDS test params to use absolute
paths (`/tmp/tractor_test/...`, `/tmp/tractor_rt/...`)
matching real runtime sockpath behavior; tighten
`test_parse_maddr_uds` to assert exact `filedir`.

Review: PR #429 (copilot-pull-request-reviewer[bot])
https://github.com/goodboy/tractor/pull/429#pullrequestreview-4018448152

(this patch was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code

tests/discovery/test_multiaddr.py

@@ -74,10 +74,11 @@ def test_mk_maddr_uds():
     multiaddr containing the full socket path.
 
     '''
-    # NOTE, use a relative `filedir` since the multiaddr
+    # NOTE, use an absolute `filedir` to match real runtime
-    # parser rejects the double-slash from absolute paths
+    # UDS paths; `mk_maddr()` strips the leading `/` to avoid
-    # (i.e. `/unix//tmp/..` -> "empty protocol path").
+    # the double-slash `/unix//run/..` that py-multiaddr
-    filedir = 'tractor_test'
+    # rejects as "empty protocol path".
+    filedir = '/tmp/tractor_test'
     filename = 'test_sock.sock'
     addr = UDSAddress(
         filedir=filedir,
@@ -89,12 +90,14 @@ def test_mk_maddr_uds():
 
     result_str: str = str(result)
     assert result_str.startswith('/unix/')
+    # verify the leading `/` was stripped to avoid double-slash
+    assert '/unix/tmp/tractor_test/' in result_str
 
-    sockpath: str = str(Path(filedir) / filename)
+    sockpath_rel: str = str(
-    # NOTE, the multiaddr lib prepends a `/` to the
+        Path(filedir) / filename
-    # unix protocol value when parsing back out.
+    ).lstrip('/')
     unix_val: str = result.value_for_protocol('unix')
-    assert unix_val.endswith(sockpath)
+    assert unix_val.endswith(sockpath_rel)
 
 
 def test_mk_maddr_unsupported_proto_key():
@@ -120,7 +123,7 @@ def test_mk_maddr_unsupported_proto_key():
         ),
         pytest.param(
             UDSAddress(
-                filedir='tractor_rt',
+                filedir='/tmp/tractor_rt',
                 filename='roundtrip.sock',
             ),
             id='uds',
@@ -181,15 +184,16 @@ def test_parse_maddr_tcp_ipv6():
 def test_parse_maddr_uds():
     '''
     `parse_maddr()` on a `/unix/...` multiaddr string
-    produce a `UDSAddress` with the correct dir and filename.
+    produce a `UDSAddress` with the correct dir and filename,
+    preserving absolute path semantics.
 
     '''
-    result = parse_maddr('/unix/tractor_test/test.sock')
+    result = parse_maddr('/unix/tmp/tractor_test/test.sock')
 
     assert isinstance(result, UDSAddress)
     filedir, filename = result.unwrap()
     assert filename == 'test.sock'
-    assert 'tractor_test' in str(filedir)
+    assert str(filedir) == '/tmp/tractor_test'
 
 
 def test_parse_maddr_unsupported():
@@ -214,7 +218,7 @@ def test_parse_maddr_unsupported():
         ),
         pytest.param(
             UDSAddress(
-                filedir='tractor_rt',
+                filedir='/tmp/tractor_rt',
                 filename='roundtrip.sock',
             ),
             id='uds',

tractor/discovery/_multiaddr.py

@@ -114,13 +114,14 @@ def parse_maddr(
 
         case ['unix']:
             # NOTE, the multiaddr lib prepends a `/` to the
-            # unix protocol value; strip it to recover the
+            # unix protocol value which effectively restores
-            # original relative path.
+            # the absolute-path semantics that `mk_maddr()`
+            # strips when building the multiaddr string.
             raw: str = maddr.value_for_protocol('unix')
-            sockpath = Path(raw.lstrip('/'))
+            sockpath = Path(raw)
             return UDSAddress(
-                filedir=str(sockpath.parent),
+                filedir=sockpath.parent,
-                filename=str(sockpath.name),
+                filename=sockpath.name,
             )
 
         case _: