seeding expansion

also: replace energy output with energy output density

src/physcom/db/repository.py

@@ -153,6 +153,35 @@ class Repository:
         self.conn.commit()
         return dep
 
+    def replace_entity_dependencies(self, entity_id: int, deps: list[Dependency]) -> None:
+        """Delete all existing dependencies for an entity and insert new ones."""
+        self.conn.execute("DELETE FROM dependencies WHERE entity_id = ?", (entity_id,))
+        for dep in deps:
+            cur = self.conn.execute(
+                """INSERT INTO dependencies
+                   (entity_id, category, key, value, unit, constraint_type)
+                   VALUES (?, ?, ?, ?, ?, ?)""",
+                (entity_id, dep.category, dep.key, dep.value, dep.unit, dep.constraint_type),
+            )
+            dep.id = cur.lastrowid
+        self.conn.commit()
+
+    def get_entity_by_name(self, dimension: str, name: str) -> Entity | None:
+        row = self.conn.execute(
+            """SELECT e.id, e.name, e.description, d.name as dimension, e.dimension_id
+               FROM entities e JOIN dimensions d ON e.dimension_id = d.id
+               WHERE d.name = ? AND e.name = ?""",
+            (dimension, name),
+        ).fetchone()
+        if not row:
+            return None
+        deps = self._load_dependencies(row["id"])
+        return Entity(
+            id=row["id"], name=row["name"], description=row["description"] or "",
+            dimension=row["dimension"], dimension_id=row["dimension_id"],
+            dependencies=deps,
+        )
+
     def update_dependency(self, dep_id: int, dep: Dependency) -> None:
         self.conn.execute(
             """UPDATE dependencies
@@ -772,3 +801,20 @@ class Repository:
             (combo_id, domain_id),
         ).fetchone()
         return dict(row) if row else None
+
+    # ── Admin ────────────────────────────────────────────────────
+
+    def clear_all(self) -> None:
+        """Delete all data from every table in FK-safe order."""
+        self.conn.execute("DELETE FROM pipeline_runs")
+        self.conn.execute("DELETE FROM combination_results")
+        self.conn.execute("DELETE FROM combination_scores")
+        self.conn.execute("DELETE FROM combination_entities")
+        self.conn.execute("DELETE FROM combinations")
+        self.conn.execute("DELETE FROM dependencies")
+        self.conn.execute("DELETE FROM entities")
+        self.conn.execute("DELETE FROM domain_metric_weights")
+        self.conn.execute("DELETE FROM domains")
+        self.conn.execute("DELETE FROM metrics")
+        self.conn.execute("DELETE FROM dimensions")
+        self.conn.commit()