enable all ruff rules with curated ignores and fix violations

[StrongWind1]

Summary

• Configure ruff to select ALL lint rules with a curated ignore list tailored for protocol/security tooling code
• Apply safe auto-fixes (119 violations) and manually fix remaining 66 violations
• No inline noqa directives — all ignores centralized in pyproject.toml with official linter group names and rationale comments
• Fix a real bug: threading.Lock() created inside with statement in msrpc/rpc.py had no effect (lock was immediately discarded)

Changes

• pyproject.toml: select = ["ALL"] with 40+ ignored rules organized by linter group
• Bug fix: msrpc/rpc.py — store lock as self._conn_lock so it persists across calls
• Safety: datetime.now() → datetime.now(tz=UTC) in 4 locations
• Cleanup: raise Exception → ValueError/RuntimeError, raise e → bare raise, try/except/pass → contextlib.suppress, list comprehensions, implicit string concat in logging
• No logic changes other than the lock fix

[MatrixEditor]

LGTM