Bug fix: Enhance embeding model to give better error message (#15346)

To resolve https://github.com/infiniflow/ragflow/issues/15343 enhance
the model embedding message to give extact failure message to customer.


# QWen

## Retrieval
<img width="3321" height="1033" alt="image"
src="https://github.com/user-attachments/assets/6b82921a-a3a7-4a33-a383-1cf316398ee2"
/>

## Chat
<img width="2241" height="311" alt="image"
src="https://github.com/user-attachments/assets/ec311365-62d5-407a-8915-5c8d72be9716"
/>


# SiliconFlow
## Retrieval
<img width="3321" height="1033" alt="image"
src="https://github.com/user-attachments/assets/ee2cd191-a27d-4729-b53d-2fbdb4e352cd"
/>

## Chat
<img width="1562" height="210" alt="image"
src="https://github.com/user-attachments/assets/10376a8e-a3f4-422f-bc2e-96f2a8a96448"
/>

# Baichuan
## Retrieval
<img width="3321" height="1107" alt="image"
src="https://github.com/user-attachments/assets/dcb5409d-f7fc-4804-b186-5e1ee11e09c4"
/>

## Chat
<img width="2241" height="311" alt="image"
src="https://github.com/user-attachments/assets/ec311365-62d5-407a-8915-5c8d72be9716"
/>


# Zhipu
zhipu is good.

docker/launch_admin_service.sh

@@ -0,0 +1,98 @@
+#!/bin/bash
+
+# Exit immediately if a command exits with a non-zero status
+set -e
+
+# Function to load environment variables from .env file
+load_env_file() {
+    # Get the directory of the current script
+    local script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+    local env_file="$script_dir/.env"
+
+    # Check if .env file exists
+    if [ -f "$env_file" ]; then
+        echo "Loading environment variables from: $env_file"
+        # Source the .env file
+        set -a
+        source "$env_file" 
+        set +a
+    else
+        echo "Warning: .env file not found at: $env_file"
+    fi
+}
+
+# Load environment variables
+load_env_file
+
+# Unset HTTP proxies that might be set by Docker daemon
+export http_proxy=""; export https_proxy=""; export no_proxy=""; export HTTP_PROXY=""; export HTTPS_PROXY=""; export NO_PROXY=""
+export PYTHONPATH=$(pwd)
+
+export LD_LIBRARY_PATH=/usr/lib/x86_64-linux-gnu/
+JEMALLOC_PATH=$(pkg-config --variable=libdir jemalloc)/libjemalloc.so
+
+PY=python3
+
+# Set default number of workers if WS is not set or less than 1
+if [[ -z "$WS" || $WS -lt 1 ]]; then
+  WS=1
+fi
+
+# Maximum number of retries for each task executor and server
+MAX_RETRIES=5
+
+# Flag to control termination
+STOP=false
+
+# Array to keep track of child PIDs
+PIDS=()
+
+# Set the path to the NLTK data directory
+export NLTK_DATA="./nltk_data"
+
+# Function to handle termination signals
+cleanup() {
+  echo "Termination signal received. Shutting down..."
+  STOP=true
+  # Terminate all child processes
+  for pid in "${PIDS[@]}"; do
+    if kill -0 "$pid" 2>/dev/null; then
+      echo "Killing process $pid"
+      kill "$pid"
+    fi
+  done
+  exit 0
+}
+
+# Trap SIGINT and SIGTERM to invoke cleanup
+trap cleanup SIGINT SIGTERM
+
+# Function to execute admin_server with retry logic
+run_server(){
+    local retry_count=0
+    while ! $STOP && [ $retry_count -lt $MAX_RETRIES ]; do
+        echo "Starting admin_server.py (Attempt $((retry_count+1)))"
+        $PY admin/server/admin_server.py
+        EXIT_CODE=$?
+        if [ $EXIT_CODE -eq 0 ]; then
+            echo "admin_server.py exited successfully."
+            break
+        else
+            echo "admin_server.py failed with exit code $EXIT_CODE. Retrying..." >&2
+            retry_count=$((retry_count + 1))
+            sleep 2
+        fi
+    done
+
+    if [ $retry_count -ge $MAX_RETRIES ]; then
+        echo "admin_server.py failed after $MAX_RETRIES attempts. Exiting..." >&2
+        cleanup
+    fi
+}
+
+# Start the main server
+run_server &
+PIDS+=($!)
+
+# Wait for all background processes to finish
+wait