Cherry-pick health and version API enhancements to release-3.6.1 (#124)

* feat(health,version): add health and version endponts

* fix(health): add constant and remove duplicates

* fix(health): avoid permanent DEGRADED from historical deadlocks

* fix(health): Removed the unnecessary boolean literal

* fix(health):  Fixed the broken lock-wait detection

* fix(health): avoid blocking DB I/O under write lock and restore interrupt flag

* fix(health): add cancelFutures in healthservice

* fix(health): close basic DB connection before advanced checks and remove shared-map race

Author: DurgaPrasad-54

src/main/java/com/iemr/admin/controller/health/HealthController.java

@@ -0,0 +1,86 @@
+/*
+* AMRIT – Accessible Medical Records via Integrated Technology 
+* Integrated EHR (Electronic Health Records) Solution 
+*
+* Copyright (C) "Piramal Swasthya Management and Research Institute" 
+*
+* This file is part of AMRIT.
+*
+* This program is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program.  If not, see https://www.gnu.org/licenses/.
+*/
+package com.iemr.admin.controller.health;
+
+import java.time.Instant;
+import java.util.Map;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import com.iemr.admin.service.health.HealthService;
+
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.responses.ApiResponse;
+import io.swagger.v3.oas.annotations.responses.ApiResponses;
+import io.swagger.v3.oas.annotations.tags.Tag;
+
+@RestController
+@RequestMapping("/health")
+@Tag(name = "Health Check", description = "APIs for checking infrastructure health status")
+public class HealthController {
+
+    private static final Logger logger = LoggerFactory.getLogger(HealthController.class);
+
+    private final HealthService healthService;
+    
+    public HealthController(HealthService healthService) {
+        this.healthService = healthService;
+    }
+
+    @GetMapping
+    @Operation(summary = "Check infrastructure health", 
+               description = "Returns the health status of MySQL, Redis, and other configured services")
+    @ApiResponses({
+        @ApiResponse(responseCode = "200", description = "Services are UP or DEGRADED (operational with warnings)"),
+        @ApiResponse(responseCode = "503", description = "One or more critical services are DOWN")
+    })
+    public ResponseEntity<Map<String, Object>> checkHealth() {
+        logger.debug("Health check endpoint called");
+        
+        try {
+            Map<String, Object> healthStatus = healthService.checkHealth();
+            String overallStatus = (String) healthStatus.get("status");
+            
+            HttpStatus httpStatus = "DOWN".equals(overallStatus) ? HttpStatus.SERVICE_UNAVAILABLE : HttpStatus.OK;
+            
+            logger.debug("Health check completed with status: {}", overallStatus);
+            return new ResponseEntity<>(healthStatus, httpStatus);
+            
+        } catch (Exception e) {
+            logger.error("Unexpected error during health check", e);
+            
+            Map<String, Object> errorResponse = Map.of(
+                "status", "DOWN",
+                "timestamp", Instant.now().toString()
+            );
+            
+            return new ResponseEntity<>(errorResponse, HttpStatus.SERVICE_UNAVAILABLE);
+        }
+    }
+}
+

src/main/java/com/iemr/admin/controller/version/VersionController.java

@@ -19,6 +19,7 @@
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see https://www.gnu.org/licenses/.
 */
+
 package com.iemr.admin.controller.version;
 
 import java.io.BufferedReader;
@@ -36,6 +37,11 @@
 import com.iemr.admin.utils.response.OutputResponse;
 
 import io.swagger.v3.oas.annotations.Operation;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.LinkedHashMap;
+import java.util.Properties;
+import org.springframework.http.MediaType;
 
 
 @RestController