v0.1.5

Fixes Session Graph startup on DeepSeek Harness 0.1.2-alpha.2 after the Typert Remote failure API transition.\n\n- Supports both Harness 0.1.2-alpha.1 and 0.1.2-alpha.2.\n- Selects the active Harness Remote error constructor without an incompatible static import.\n- Adds regression coverage for the packaged Host entry.\n- Expands CI to test and packed-profile smoke both Harness versions.\n\nVerified with 167 standalone tests, 97 Harness integration tests per compatibility target, and isolated package installation/removal.