feat: Add specific error handling for LLM configuration in health checks (#55)

app.py

@@ -9,17 +9,41 @@ from flask import Flask, jsonify, render_template, request
 # Load environment variables from .env file
 load_dotenv()
 
-# Disable ChromaDB anonymized telemetry for local development so the
-# library doesn't attempt to call external PostHog telemetry endpoints.
-# This avoids noisy errors in server logs and respects developer privacy.
+# Proactively disable ChromaDB telemetry via environment variables so
+# the library doesn't attempt to call external PostHog telemetry endpoints.
+# This helps avoid noisy errors in server logs (Render may not expose
+# the expected device files or telemetry endpoints).
+os.environ.setdefault("ANONYMIZED_TELEMETRY", "False")
+os.environ.setdefault("CHROMA_TELEMETRY", "False")
+
+# Attempt to configure chromadb and monkeypatch any telemetry capture
+# functions to be no-ops. Some chromadb versions call posthog.capture
+# with a different signature which can raise exceptions during runtime
+# (observed on Render as: capture() takes 1 positional argument but 3 were given).
 try:
     import chromadb
 
-    # Turn off anonymized telemetry (the chromadb package defaults this to True)
-    # Using Any type to avoid issues with unknown parameters
-    chromadb.configure(anonymized_telemetry=False)  # type: ignore
+    try:
+        chromadb.configure(anonymized_telemetry=False)  # type: ignore
+    except Exception:
+        # Non-fatal: continue and still try to neutralize telemetry functions
+        pass
+
+    # Defensive monkeypatch: if the telemetry client exists, replace capture
+    # with a safe no-op that accepts any args/kwargs to avoid signature issues.
+    try:
+        from chromadb.telemetry.product import posthog as _posthog  # type: ignore
+
+        # Replace module-level capture and Posthog.capture if present
+        if hasattr(_posthog, "capture"):
+            setattr(_posthog, "capture", lambda *args, **kwargs: None)
+        if hasattr(_posthog, "Posthog") and hasattr(_posthog.Posthog, "capture"):
+            setattr(_posthog.Posthog, "capture", lambda *args, **kwargs: None)
+    except Exception:
+        # If telemetry internals aren't present or change across versions, ignore
+        pass
 except Exception:
-    # If chromadb isn't installed in this environment yet, ignore silently.
+    # chromadb not installed or import failed; continue without telemetry
     pass
 
 app = Flask(__name__)