fix: Update remaining path references after directory rename

- Update README.md path references from multi-agent-qse to qse-evaluation-harness
- Fix Dockerfile.alpha WORKDIR path to match renamed directory

Author: ankurgitks

instrumentation-genai/opentelemetry-instrumentation-langchain/examples/qse-evaluation-harness/README.md

@@ -149,7 +149,7 @@ pip install -e util/opentelemetry-util-genai-emitters-splunk/
 
 ### 2. API Configuration
 
-Create `.env` file in the `multi-agent-qse/` directory:
+Create `.env` file in the `qse-evaluation-harness/` directory:
 
 ```bash
 # Required
@@ -191,7 +191,7 @@ chmod +x run_qse_harness.sh
 ### Command Line Interface
 
 ```bash
-cd instrumentation-genai/opentelemetry-instrumentation-langchain/examples/multi-agent-qse/
+cd instrumentation-genai/opentelemetry-instrumentation-langchain/examples/qse-evaluation-harness/
 
 # Run single scenario
 ./run_qse_harness.sh --single 0    # Bias detection

instrumentation-genai/opentelemetry-instrumentation-langchain/examples/qse-evaluation-harness/deploy/Dockerfile.alpha

@@ -19,7 +19,7 @@ RUN apt-get update \
 COPY instrumentation-genai ${APP_HOME}/instrumentation-genai
 COPY util ${APP_HOME}/util
 
-WORKDIR ${APP_HOME}/instrumentation-genai/opentelemetry-instrumentation-langchain/examples/multi-agent-qse
+WORKDIR ${APP_HOME}/instrumentation-genai/opentelemetry-instrumentation-langchain/examples/qse-evaluation-harness
 
 # Drop any developer .env that might be present to avoid baking secrets into the image
 RUN rm -f .env