feat: bound AI-plan work to resource-control and stop zeroing missing tokens

Record the FIN-WP-0007 split after checking resource-control: they keep
intelligence resource identity and provision-level class I metering;
session tokens stay with State Hub; work-effectiveness is a reporting
join. Missing token counts are now unknown, not zero.

tests/test_ingest.py

@@ -2,7 +2,7 @@ from pathlib import Path
 
 import pytest
 
-from fin_hub.ingest.anthropic import parse_anthropic_billing_csv
+from fin_hub.ingest.anthropic import parse_anthropic_billing_csv, parse_optional_token_count
 from fin_hub.ingest.cloud import parse_cloud_cost_csv
 from fin_hub.ingest.hosteurope import parse_hosteurope_csv
 
@@ -21,6 +21,43 @@ def test_parse_anthropic_billing_csv():
     assert len(rows) == 2
     assert rows[0].provider == "anthropic"
     assert rows[0].tokens_in == 12000
+    assert rows[0].tokens_out == 3000
+
+
+def test_parse_optional_token_count_treats_empty_as_unknown():
+    assert parse_optional_token_count("") is None
+    assert parse_optional_token_count("0") == 0
+    assert parse_optional_token_count("12") == 12
+    with pytest.raises(ValueError, match="integer"):
+        parse_optional_token_count("n/a")
+    with pytest.raises(ValueError, match="negative"):
+        parse_optional_token_count("-1")
+
+
+def test_parse_anthropic_cost_only_row_does_not_invent_zero_tokens(tmp_path: Path):
+    source = tmp_path / "anthropic-cost-only.csv"
+    source.write_text(
+        "model,cost,currency,usage_date\n"
+        "claude-opus-4-20250514,20.00,USD,2026-08-01\n",
+        encoding="utf-8",
+    )
+    row = parse_anthropic_billing_csv(source)[0]
+    assert row.cost == 20.0
+    assert row.tokens_in is None
+    assert row.tokens_out is None
+
+
+def test_parse_anthropic_explicit_zero_tokens_remain_zero(tmp_path: Path):
+    source = tmp_path / "anthropic-zero-tokens.csv"
+    source.write_text(
+        "model,input_tokens,output_tokens,cost,currency,usage_date\n"
+        "claude-haiku-3-20240307,0,0,0.00,USD,2026-08-02\n",
+        encoding="utf-8",
+    )
+    row = parse_anthropic_billing_csv(source)[0]
+    assert row.tokens_in == 0
+    assert row.tokens_out == 0
+    assert row.cost == 0.0
 
 
 def test_parse_hosteurope_csv():