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_lib.sh

@@ -3,13 +3,22 @@
 # SAP HANA Monitoring Library - Shared Functions
 # =============================================================================
 
-# Logging function with script name prefix
-# Usage: log_message "SCRIPT_NAME" "message"
-log_message() {
-    local script_name="$1"
-    local message="$2"
-    local timestamp=$(date "+%Y-%m-%d %H:%M:%S")
-    echo "[${timestamp}] [${script_name}] ${message}" | tee -a "${LOG_FILE}"
+# Initialize script with common setup
+# Usage: init_script "SCRIPT_NAME"
+# Sets up: SCRIPT_DIR, SCRIPT_NAME, LOG_FILE, LOCK_DIR
+init_script() {
+    SCRIPT_NAME="$1"
+    SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" &>/dev/null && pwd)"
+    
+    # Load configuration
+    source "${SCRIPT_DIR}/hana.conf"
+    
+    # Setup logging
+    LOG_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" &>/dev/null && pwd)"
+    LOG_FILE="${LOG_DIR}/hana_monitor.log"
+    
+    # Setup lock directory
+    LOCK_DIR="/tmp"
 }
 
 # Acquire lock for script execution
@@ -38,6 +47,15 @@ release_lock() {
     fi
 }
 
+# Logging function with script name prefix
+# Usage: log_message "SCRIPT_NAME" "message"
+log_message() {
+    local script_name="$1"
+    local message="$2"
+    local timestamp=$(date "+%Y-%m-%d %H:%M:%S")
+    echo "[${timestamp}] [${script_name}] ${message}" | tee -a "${LOG_FILE}"
+}
+
 # Send notification via ntfy
 # Usage: send_notification "TITLE" "MESSAGE"
 send_notification() {
@@ -64,23 +82,6 @@ send_alert() {
     log_message "$script_name" "ALERT: ${message}"
 }
 
-# Send OK notification (state change from alert to normal)
-# Usage: send_ok "SCRIPT_NAME" "TITLE_PREFIX" "MESSAGE"
-send_ok() {
-    local script_name="$1"
-    local title_prefix="$2"
-    local message="$3"
-    send_notification "${title_prefix} Resolved" "✅ Resolved: ${message}"
-    log_message "$script_name" "RESOLVED: ${message}"
-}
-
-# Run command as HANA user using su
-# Usage: run_as_hana_user "COMMAND"
-run_as_hana_user() {
-    local command="$1"
-    su - "$HANA_USER" -c "$command"
-}
-
 # Execute SQL query as HANA user
 # Usage: execute_hana_sql "SQL_QUERY"
 # Returns: SQL output on stdout, returns 0 on success, 1 on failure
@@ -131,19 +132,3 @@ get_disk_usage_percentage() {
     fi
     df "$dir" 2>/dev/null | awk 'NR==2 {gsub(/%/,"",$5); print $5}'
 }
-
-# Get mount point for a directory
-# Usage: get_mount_point "/path/to/dir"
-# Returns: Mount point path
-get_mount_point() {
-    local dir="$1"
-    df "$dir" 2>/dev/null | awk 'NR==2 {print $NF}'
-}
-
-# Get available disk space in KB for a directory
-# Usage: get_available_space_kb "/path/to/dir"
-# Returns: Available space in KB
-get_available_space_kb() {
-    local dir="$1"
-    df -k "$dir" 2>/dev/null | awk 'NR==2 {print $4}'
-}