fix: resolve ruff lint errors blocking CI

Remove unused imports (gravy_score, math, json, pytest) and strip
extraneous f-prefix from two plain string literals.

Author: cschanhniem

src/openamp_foundry/benchmark/retrospective.py

@@ -112,7 +112,7 @@ def run_retrospective_benchmark(
     """
     from openamp_foundry.features.physchem import compute_features
     from openamp_foundry.scoring.activity import activity_likeness_score
-    from openamp_foundry.scoring.boman import boman_activity_score, gravy_score
+    from openamp_foundry.scoring.boman import boman_activity_score
     from openamp_foundry.scoring.ensemble import ensemble_score
     from openamp_foundry.scoring.novelty import novelty_score
     from openamp_foundry.scoring.safety import safety_score

src/openamp_foundry/cli.py

@@ -650,7 +650,7 @@ def _run_presynth_qc(args: argparse.Namespace) -> int:
             f"- **SPPS difficulty:** {r.synthesis_difficulty}",
         ]
         if r.flags:
-            lines.append(f"- **FLAGS:**")
+            lines.append("- **FLAGS:**")
             for flag in r.flags:
                 lines.append(f"  - ⚠ {flag}")
         else:

src/openamp_foundry/qc/presynth_check.py

@@ -5,7 +5,6 @@
 """
 from __future__ import annotations
 
-import math
 import re
 from dataclasses import dataclass, field
 

src/openamp_foundry/reports/pilot_panel.py

@@ -122,7 +122,7 @@ def write_pilot_markdown(panel: list[dict], path: str | Path, generated_at: str
         "make pilot    # selects this panel from the nominees",
         "```",
         "",
-        f"Full methodology: `docs/NOMINATION_REPORT.md`",
+        "Full methodology: `docs/NOMINATION_REPORT.md`",
     ]
 
     out.write_text("\n".join(lines) + "\n", encoding="utf-8")

tests/test_pilot_panel.py

@@ -2,7 +2,6 @@
 from __future__ import annotations
 
 import csv
-import json
 
 import pytest
 

tests/test_safety_moment.py

@@ -1,8 +1,6 @@
 """Tests for hydrophobic-moment-aware safety scorer (v0.4)."""
 from __future__ import annotations
 
-import pytest
-
 from openamp_foundry.features.physchem import compute_features
 from openamp_foundry.scoring.safety import safety_score