Update src/config_loader.py

Update src/config_loader.py

Update api-key access for llama model

fix: Round 14 — 28 Tier 1 + Tier 2 bugs fixed across 17 source files

fix: pre-release audit round 12 — 33 bugs fixed across all tiers

fix: Round 8 audit — 15 bugs fixed across 10 files (1 CRITICAL, 7 HIGH, 3 MEDIUM, 4 LOW)

fix: 6-agent debug audit — 8 bugs fixed across codebase

fix: harden codebase against format injection, empty responses, and unsafe config access

Initial commit: RAG Research Chatbot Template