Fix active category lookup and README usage examples

README.md

@@ -23,20 +23,29 @@ alembic upgrade head
 
 ```python
 from src.ingest.b4w import ingest_b4w
+from src.db import get_session
 from pathlib import Path
 
 csv_path = Path("/mnt/anbau/Software/Python/finanz-cockpit/scripts/dummy_data/b4w_export_dummy_01.csv")
-ingest_b4w(csv_path)
+with get_session() as session:
+    ingest_b4w(csv_path, session)
 ```
 
 ### Import comdirect Export
 
 ```python
 from src.ingest.comdirect import ingest_comdirect
+from src.db import get_session
 from pathlib import Path
 
 csv_path = Path("/mnt/anbau/Software/Python/finanz-cockpit/scripts/dummy_data/comdirect_giro_01.csv")
-ingest_comdirect(csv_path)
+with get_session() as session:
+    ingest_comdirect(
+        session,
+        csv_path,
+        account_iban="DE89370400440532013000",
+        account_currency="EUR",
+    )
 ```
 
 ### Set Category Budgets
@@ -45,6 +54,7 @@ ingest_comdirect(csv_path)
 from src.models.category import Category, CategoryBudget
 from datetime import date
 from src.domain_utils import set_category_budget
+from src.db import get_session
 
 # Create category hierarchy
 cat = Category.from_str("Lebenshaltung:Essen:Supermarkt")
@@ -56,14 +66,17 @@ budget = CategoryBudget(
     valid_from=date(2026, 10, 1),
     valid_to=date(2026, 11, 30),
 )
-set_category_budget(db_session, budget)
+with get_session() as session:
+    set_category_budget(session, budget)
+    session.commit()
 
-# Budgets can also be unbounded (no dates specified)
-budget = CategoryBudget(
-    category=cat,
-    amount_eur=200.00,  # Monthly average
-)
-set_category_budget(db_session, budget)
+    # Budgets can also be unbounded (no dates specified)
+    budget = CategoryBudget(
+        category=cat,
+        amount_eur=200.00,  # Monthly average
+    )
+    set_category_budget(session, budget)
+    session.commit()
 ```
 
 ## Testing
@@ -141,7 +154,7 @@ alembic upgrade head
 pytest
 
 # Run with coverage report
-pytest --cov=src --cov-report=html -c .coverage htmlcov
+pytest --cov=src --cov-report=html:htmlcov
 ```
 
 ### Common Patterns