Make the component library a standalone product door (2.63.0).

Add /api/library datasheet import and component GET/PUT with no exam.
Reorganize pytest into datasheet, library, schematic, PCB, and AF+AI.
Document Rust criteria (none chosen; no rustup) and coding conformity.

tests/test_pcb_sse_terminal.py

@@ -1,43 +0,0 @@
-"""PCB SSE terminal mapping — complete is not pcb_error."""
-
-from backend.services.pcb_pipeline import pcb_sse_terminal_from_status
-
-
-def test_complete_status_is_pcb_complete_not_error():
-    ev, data = pcb_sse_terminal_from_status(
-        "complete",
-        {"findings": 38, "domains": 3, "groups": 4},
-        "pcb_status=complete (terminal)",
-    )
-    assert ev == "pcb_complete"
-    assert data["findings"] == 38
-    assert data["domains"] == 3
-    assert data["groups"] == 4
-    assert "error" not in data
-
-
-def test_complete_reason_without_status_still_completes():
-    ev, data = pcb_sse_terminal_from_status(
-        "running",
-        {},
-        "pcb_status=complete (terminal)",
-    )
-    assert ev == "pcb_complete"
-    assert data.get("synthetic") is True
-
-
-def test_error_status_stays_pcb_error():
-    ev, data = pcb_sse_terminal_from_status(
-        "error",
-        {"error": "parse failed"},
-        "pcb_status=error (terminal)",
-    )
-    assert ev == "pcb_error"
-    assert data["error"] == "parse failed"
-
-
-def test_cancelled_status_is_pcb_cancelled():
-    ev, _data = pcb_sse_terminal_from_status(
-        "cancelled", {}, "pcb_status=cancelled (terminal)",
-    )
-    assert ev == "pcb_cancelled"