Fix installed Campbell provenance lookup

CHANGELOG.md

@@ -48,6 +48,9 @@ the candidate scope; it does not announce a release or assign a version DOI.
 - The candidate adds `rotating_modal` and `campbell` routes with provisional
   result contracts. They are not represented as stable API guarantees before
   the 0.2.11 publication decision.
+- Fixed Campbell execution-provenance hashing to resolve implementation files
+  from the installed wheel layout as well as a source checkout; no solver or
+  tracking calculation changed.
 - Package metadata identifies 0.2.11; `CITATION.cff` continues to identify the
   actually published 0.2.10 release. The package DOI URL uses the published
   project concept DOI until a version DOI exists.

src/solveur/core/analyses/campbell.py

@@ -250,6 +250,15 @@ def _result_hash(result: RotatingModalResult) -> str:
     return content_digest(payload.encode("utf-8"))
 
 
+def _implementation_source_path(relative: str) -> Path:
+    """Resolve a selected solveur source path in either checkout or wheel layout."""
+    prefix = "src/solveur/"
+    if not relative.startswith(prefix) or "\\" in relative or ".." in Path(relative).parts:
+        raise ValueError(f"Unexpected Campbell implementation path: {relative}")
+    package_root = Path(__file__).resolve().parents[2]
+    return package_root / relative[len(prefix) :]
+
+
 def _execution_identity(
     *, model_digest: str, validated: ValidatedCampbellInput, matrix_hash: str
 ) -> tuple[dict[str, Any], dict[str, Any]]:
@@ -275,8 +284,9 @@ def _execution_identity(
         "src/solveur/core/model.py",
         "src/solveur/post/campbell.py",
     )
+
     code_hashes = {
-        relative: hashlib.sha256((repository / relative).read_bytes()).hexdigest()
+        relative: hashlib.sha256(_implementation_source_path(relative).read_bytes()).hexdigest()
         for relative in implementation_files
     }
     environment = {

tests/unit/test_campbell.py

@@ -3,10 +3,12 @@
 from __future__ import annotations
 
 import json
+from pathlib import Path
 
 import numpy as np
 import pytest
 
+import solveur.core.analyses.campbell as campbell_analysis
 from solveur.core.analyses.campbell import CampbellInputValidator, CampbellSolver
 from solveur.core.analyses.settings import AnalysisSettings
 from solveur.core.dofs import DOF_ORDER
@@ -18,6 +20,20 @@
 from solveur.io.schema import JsonSchemaValidator
 
 
+def test_implementation_hash_paths_support_installed_wheel_layout(tmp_path: Path, monkeypatch) -> None:
+    package_root = tmp_path / "venv" / "Lib" / "site-packages" / "solveur"
+    module_file = package_root / "core" / "analyses" / "campbell.py"
+    module_file.parent.mkdir(parents=True)
+    module_file.write_text("# installed wheel layout\n", encoding="utf-8")
+    monkeypatch.setattr(campbell_analysis, "__file__", str(module_file))
+
+    implementation = campbell_analysis._implementation_source_path(
+        "src/solveur/core/analyses/rotating_modal.py"
+    )
+
+    assert implementation == package_root / "core" / "analyses" / "rotating_modal.py"
+
+
 def _beam_material() -> dict[str, float | str]:
     radius = 0.05
     area = np.pi * radius**2