541539c1a8
Contract tests for code-queue workdir path normalization: - absolute paths preserved as-is (/workspace, /home/ubuntu, /mnt/d/work) - relative paths prefixed per-provider base (D518/D601 -> /home/ubuntu, main-server -> /workspace) - trailing slash stripping, null char rejection, max-length enforcement - providerId defaulting to main-server when empty No real D518 paths accessed; fixture-only test validates the workdir registration contract for paper/met_nonlinear path indexing.