fix(solutions): clamp solution-template installTimeoutMs to a configurable max

The post-install Thread.sleep was driven by installTimeoutMs from the uploaded solution.json with no upper bound — a malicious or misconfigured template could pin an HTTP worker thread indefinitely. Cap it at a configurable max (default 60s) exposed as iot-hub.max-install-timeout-ms with an IOT_HUB_MAX_INSTALL_TIMEOUT_MS env override.

application/src/main/java/org/thingsboard/server/service/solutions/DefaultSolutionService.java

@@ -189,6 +189,9 @@ public class DefaultSolutionService implements SolutionService {
     @Value("${iot-hub.max-archive-entry-count:10000}")
     private int maxArchiveEntryCount;
 
+    @Value("${iot-hub.max-install-timeout-ms:60000}")
+    private long maxInstallTimeoutMs;
+
     private final RuleChainService ruleChainService;
     private final TbRuleChainService tbRuleChainService;
     private final DeviceProfileService deviceProfileService;
@@ -400,7 +403,7 @@ public class DefaultSolutionService implements SolutionService {
 
             List<ReferenceableEntityDefinition> ruleChainDefs = loadListOfEntitiesIfFileExists(ctx.getTempDir(), "rule_chains.json", new TypeReference<>() {});
             if (ruleChainDefs.stream().anyMatch(r -> StringUtils.isNotEmpty(r.getUpdate()))) {
-                long timeout = loadInstallTimeoutMs(ctx.getTempDir());
+                long timeout = Math.min(loadInstallTimeoutMs(ctx.getTempDir()), maxInstallTimeoutMs);
                 if (timeout > 0) {
                     Thread.sleep(timeout);
                 }

application/src/main/resources/thingsboard.yml

@@ -2175,3 +2175,4 @@ iot-hub:
   max-uncompressed-archive-bytes: "${IOT_HUB_MAX_UNCOMPRESSED_ARCHIVE_BYTES:209715200}" # maximum cumulative uncompressed size in bytes for a solution template archive. Extraction aborts past this threshold to mitigate zip-bomb attacks.
   max-uncompressed-entry-bytes: "${IOT_HUB_MAX_UNCOMPRESSED_ENTRY_BYTES:52428800}" # maximum uncompressed size in bytes for any single entry inside a solution template archive.
   max-archive-entry-count: "${IOT_HUB_MAX_ARCHIVE_ENTRY_COUNT:10000}" # maximum number of entries allowed inside a solution template archive.
+  max-install-timeout-ms: "${IOT_HUB_MAX_INSTALL_TIMEOUT_MS:60000}" # upper clamp in milliseconds for the post-install wait declared in a solution template's solution.json. Prevents a malicious or misconfigured template from pinning an HTTP worker thread.