Remove Mockito: replace mock-based tests with fakes and FakeWsmanServer

[bertysentry]

Closes #119.

What

Removes org.mockito:mockito-inline (deprecated, breaks on recent JDKs) and rewrites the last three mock-based test files as end-to-end tests against the in-process FakeWsmanServer.

Test rewrites

Test	Before	After
WinRMWqlExecutorTest	mockStatic(WinRMExecutorFactory) + interface mock	End to end: executeWql → factory → LightWinRMService → WsmanClient → FakeWsmanServer, real NTLMv2 handshake and message encryption; also pins the query sent on the wire
WinRMCommandExecutorTest	3× mockStatic + ScriptedWindowsRemoteExecutor behind a mocked factory	End to end for both paths: no-copy (code-page query + command + shell delete on close, ×3 file-list variants) and file-copy (the full in-shell transfer sequence: MKDIR, digest probe, chunked echo, certutil decode, publish, then CMD.EXE /C (...) with the content-addressed remote name)
WinRmCliTest.decodesCommandOutputUsingTheRemoteWindowsCodePage	mock(LightWinRMService) + mockStatic(WindowsRemoteProcessUtils)	End to end: the fake server reports CodeSet 1251 and serves windows-1251 stdout bytes; the test proves the CLI queries the code page and decodes with it

Test infrastructure

• FakeWsmanServer is now public (usable from the wql, command, and cli test packages).
• New FakeWsmanResponses helper: the canned SOAP response bodies (enumeration results, shell lifecycle, faults) and whole-exchange enqueue helpers, shared with WsmanProtocolTest (whose private duplicates are gone).

JDK 25 build support (acceptance criterion of #119)

With Mockito gone, the remaining JDK 25 blockers were the quality tools crashing on the JDK 25 class library ("Unsupported class file major version 69"):

• maven-pmd-plugin 3.26.0 → 3.28.0 (PMD 7.7.0 → 7.17.0). PMD 7.7.0's failed type resolution also produced a false-positive UnusedPrivateMethod on LightWinRMService.executeWithTimeout.
• spotbugs-maven-plugin 4.9.3.0 → 4.10.3.0, gate and site report pinned to the same version.

Verification

• mvn clean verify site green on JDK 17 (CI) and JDK 25 (default): 83 tests, 0 checkstyle/PMD/CPD/SpotBugs findings — the JDK pin for local builds can be dropped.
• mvn dependency:tree: no mockito, byte-buddy, or objenesis; test scope is JUnit only.
• No org.mockito import remains anywhere in the repository.

🤖 Generated with Claude Code