refactor(monitoring): simplify monitoring scripts and remove state tracking

- Remove consecutive breach tracking for statement queue (immediate alerts)
- Consolidate script initialization into init_script() function
- Remove unused helper functions (send_ok, run_as_hana_user, get_mount_point)
- Flatten sld_watchdog.sh structure by removing main() wrapper
- Remove state directory and lock directory configuration from hana.conf
- Simplify alert messages to include threshold values

This continues the simplification effort from previous commits by removing stateful tracking mechanisms and streamlining the monitoring logic for easier maintenance.

hana_queue.sh

@@ -30,7 +30,7 @@ fi
 STATEMENT_QUEUE_SQL="SELECT COUNT(*) FROM M_SERVICE_THREADS WHERE THREAD_TYPE = 'SqlExecutor' AND THREAD_STATE = 'Queueing';"
 
 # Execute SQL query
-queue_result=$(execute_hana_sql_query "$STATEMENT_QUEUE_SQL")
+queue_count=$(execute_hana_sql_query "$STATEMENT_QUEUE_SQL")
 sql_status=$?
 
 if [ $sql_status -ne 0 ]; then
@@ -48,30 +48,11 @@ fi
 
 log_message "$SCRIPT_NAME" "Current statement queue length: ${queue_count}"
 
-# Get breach count from state file
-breach_count_file="${STATE_DIR}/statement_queue_breach_count"
-breach_count=0
-if [ -f "$breach_count_file" ]; then
-    breach_count=$(cat "$breach_count_file")
-fi
-
+# Alert immediately if queue exceeds threshold
 if [ "$queue_count" -gt "$STATEMENT_QUEUE_THRESHOLD" ]; then
-    breach_count=$((breach_count + 1))
-    log_message "$SCRIPT_NAME" "Statement queue is above threshold (${queue_count} > ${STATEMENT_QUEUE_THRESHOLD}). Consecutive breach count: ${breach_count}/${STATEMENT_QUEUE_CONSECUTIVE_RUNS}."
-else
-    if [ "$breach_count" -gt 0 ]; then
-        log_message "$SCRIPT_NAME" "Statement queue returned to normal. Resetting breach count from ${breach_count} to 0."
-    fi
-    breach_count=0
-fi
-echo "$breach_count" > "$breach_count_file"
-
-if [ "$breach_count" -ge "$STATEMENT_QUEUE_CONSECUTIVE_RUNS" ]; then
-    message="Statement queue has been over ${STATEMENT_QUEUE_THRESHOLD} for ${breach_count} checks. Current count: ${queue_count}."
-    send_alert "$SCRIPT_NAME" "HANA Statement Queue" "$message"
+    send_alert "$SCRIPT_NAME" "HANA Statement Queue" "Statement queue count is ${queue_count}, which exceeds threshold of ${STATEMENT_QUEUE_THRESHOLD}."
     exit 1
-else
-    log_message "$SCRIPT_NAME" "Statement queue is normal. Current count: ${queue_count}."
 fi
 
+log_message "$SCRIPT_NAME" "Statement queue is normal. Current count: ${queue_count}."
 log_message "$SCRIPT_NAME" "Statement queue check complete."