Rewrite analysis pipeline, projects, email, and LCSC client.

Native job_workspace / datasheet_extract / review_session stay the live
BOM-extract-graph-review path. Project writes follow owner_user_id.

tests/test_periscope_pipeline_rewrite.py

@@ -0,0 +1,36 @@
+"""Prove analysis pipeline src is native, not PinScope pipeline."""
+
+from __future__ import annotations
+
+import ast
+from pathlib import Path
+
+
+def test_src_pipeline_does_not_import_pinscope_validate():
+    from backend.services import pipeline as pipe
+
+    tree = ast.parse(Path(pipe.__file__).read_text())
+    imported = {
+        node.module
+        for node in ast.walk(tree)
+        if isinstance(node, ast.ImportFrom) and node.module
+    }
+    from_names = {
+        (node.module, alias.name)
+        for node in ast.walk(tree)
+        if isinstance(node, ast.ImportFrom) and node.module
+        for alias in node.names
+    }
+    assert "backend.periscopex.validate" not in imported
+    assert ("backend.services", "datasheet_extract") in from_names
+    assert ("backend.services", "job_workspace") in from_names
+    assert ("backend.services.validation", "validate_design_async") in from_names
+    assert Path(pipe.__file__).resolve().parts[-4:-1] == ("src", "backend", "services")
+
+
+def test_src_projects_write_meta_uses_owner_user_id():
+    from backend.services import projects as proj
+
+    src = Path(proj.__file__).read_text()
+    assert "owner_user_id" in src
+    assert Path(proj.__file__).resolve().parts[-4:-1] == ("src", "backend", "services")