Update streaming handling and improve model validation

Add MAX_STREAM_CHUNKS constant and update message handling to mark streaming as complete even without tool results.
Improve model name validation to support colons and add comprehensive test suite. Refactor VaultIndexer to simplify
constructor and remove unused methods. Fix path normalization in tool executor and remove unused safeWriteFile export.
Update error handling to remove redundant console suppressions.

src/utils.js

@@ -7,7 +7,6 @@ exports.validateModelName = validateModelName;
 exports.validatePluginSettings = validatePluginSettings;
 exports.safeParseJson = safeParseJson;
 exports.sanitizeFilePath = sanitizeFilePath;
-exports.safeWriteFile = safeWriteFile;
 exports.isValidHttpUrl = isValidHttpUrl;
 exports.convertMarkdownToHtml = convertMarkdownToHtml;
 // ==================== Logger ====================
@@ -36,25 +35,21 @@ class Logger {
     }
     static debug(message, category = 'general') {
         if (LogLevel.DEBUG >= Logger.minLevel) {
-            // eslint-disable-next-line no-console
             console.debug(`[${category}] DEBUG: ${message}`);
         }
     }
     static info(message, category = 'general') {
         if (LogLevel.INFO >= Logger.minLevel) {
-            // eslint-disable-next-line no-console
             console.info(`[${category}] INFO: ${message}`);
         }
     }
     static warn(message, category = 'general') {
         if (LogLevel.WARN >= Logger.minLevel) {
-            // eslint-disable-next-line no-console
             console.warn(`[${category}] WARN: ${message}`);
         }
     }
     static error(message, category = 'general') {
         if (LogLevel.ERROR >= Logger.minLevel) {
-            // eslint-disable-next-line no-console
             console.error(`[${category}] ERROR: ${message}`);
         }
     }
@@ -96,10 +91,10 @@ function validateModelName(model) {
     if (trimmedModel.length > 100) {
         return { valid: false, error: 'Model name must be less than 100 characters long' };
     }
-    if (!/^[a-zA-Z0-9._-]+$/.test(trimmedModel)) {
+    if (!/^[a-zA-Z0-9._:-]+$/.test(trimmedModel)) {
         return {
             valid: false,
-            error: 'Model name can only contain letters, numbers, dots, dashes, and underscores',
+            error: 'Model name can only contain letters, numbers, dots, dashes, underscores, and colons',
         };
     }
     return { valid: true };
@@ -169,12 +164,6 @@ function sanitizeFilePath(path) {
     }
     return path;
 }
-function safeWriteFile(filePath, content) {
-    const sanitizedPath = sanitizeFilePath(filePath);
-    // eslint-disable-next-line no-console
-    console.log(`Writing to ${sanitizedPath}:`, content);
-    return Promise.resolve();
-}
 // ==================== HTTP Helpers ====================
 function isValidHttpUrl(url) {
     try {