Refactor silent debugging to happy path error handling

- Replaced instances of silentDebug with happy_path_error__with_fallback across multiple files to improve error logging and handling.
- Updated the utility function to provide clearer semantics for error handling when expected values are missing.
- Introduced a script to find potential silent failures in the codebase that may need to be addressed with the new error handling approach.

scripts/find-silent-failures.sh

@@ -0,0 +1,38 @@
+#!/bin/bash
+# Find Silent Failure Patterns
+#
+# This script searches for defensive OR patterns (|| '' || null || undefined)
+# that should potentially use happy_path_error__with_fallback instead.
+#
+# Usage: ./scripts/find-silent-failures.sh
+
+echo "=================================================="
+echo "Searching for defensive OR patterns in src/"
+echo "These MAY be silent failures that should log errors"
+echo "=================================================="
+echo ""
+
+echo "🔍 Searching for: || ''"
+echo "---"
+grep -rn "|| ''" src/ --include="*.ts" --color=always || echo "  (none found)"
+echo ""
+
+echo "🔍 Searching for: || \"\""
+echo "---"
+grep -rn '|| ""' src/ --include="*.ts" --color=always || echo "  (none found)"
+echo ""
+
+echo "🔍 Searching for: || null"
+echo "---"
+grep -rn "|| null" src/ --include="*.ts" --color=always || echo "  (none found)"
+echo ""
+
+echo "🔍 Searching for: || undefined"
+echo "---"
+grep -rn "|| undefined" src/ --include="*.ts" --color=always || echo "  (none found)"
+echo ""
+
+echo "=================================================="
+echo "Review each match and determine if it should use:"
+echo "  happy_path_error__with_fallback('description', data, fallback)"
+echo "=================================================="