Fix tier manifest: unit 199 per CI collection (env-dependent collection undercounted in .venv-gate) (#158)

The W1 floors merge (#154) carried a manifest recounted in .venv-gate, which lacks openpyxl and under-collects 10 conditionally-collected unit tests; CI's collection is authoritative. Master's tier-policy check is red until this lands.

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

Author: MaxGhenis

tests/README-tiers.md

@@ -33,9 +33,9 @@ pytest --collect-only -q -m oracle_policyengine | tail -1
 
 | Tier | Tests at HEAD |
 |---|---:|
-| `unit` | 189 |
+| `unit` | 199 |
 | `artifact` | 744 |
 | `integration_psid` | 782 |
 | `reproduction_legacy` | 520 |
 | `oracle_policyengine` | 156 |
-| **Total** | **2,391** |
+| **Total** | **2,401** |

tests/tier_counts.json

@@ -1,7 +1,7 @@
 {
   "schema_version": 1,
   "counts": {
-    "unit": 189,
+    "unit": 199,
     "artifact": 744,
     "integration_psid": 782,
     "reproduction_legacy": 520,