Wire token-budget packing into the overview/rerank fallback path

apps/ai-service/config.py

@@ -7,6 +7,20 @@ from pydantic import Field
 from pydantic_settings import BaseSettings, SettingsConfigDict
 
 
+def _default_entities_path() -> Path:
+    """2 parents up from apps/ai-service/config.py in a full repo checkout.
+
+    A container image that flattens apps/ai-service/ into its own root
+    (found live 2026-08-10: the deploy image does exactly this) doesn't have
+    that depth — ENTITIES_PATH env override is for it; this fallback just
+    keeps the class from crashing at import time when it's shallower.
+    """
+    here = Path(__file__).resolve()
+    return (
+        here.parents[2] if len(here.parents) > 2 else here.parent
+    ) / "ingestion/data/verified/drug_entities.json"
+
+
 class Settings(BaseSettings):
     model_config = SettingsConfigDict(env_file=".env", extra="ignore")
 
@@ -36,10 +50,7 @@ class Settings(BaseSettings):
     # never uses it.
     rerank_enabled: bool = False
     metrics_enabled: bool = True
-    entities_path: Path = (
-        Path(__file__).resolve().parents[2]
-        / "ingestion/data/verified/drug_entities.json"
-    )
+    entities_path: Path = _default_entities_path()
     # F-08: a per-turn budget across RagAgent's sequential Bedrock calls
     # (understand, sufficiency, generate, up to 2 entailment retries).
     # Defaults sized with headroom above what a normal turn measures live