chore: bring back disableEmbeddingsValidation default

Author: gagik

README.md

@@ -354,7 +354,7 @@ The MongoDB MCP Server can be configured using multiple methods, with the follow
 | `atlasTemporaryDatabaseUserLifetimeMs` | `MDB_MCP_ATLAS_TEMPORARY_DATABASE_USER_LIFETIME_MS` | `14400000`                                                                                             | Time in milliseconds that temporary database users created when connecting to MongoDB Atlas clusters will remain active before being automatically deleted.                                     |
 | `confirmationRequiredTools`            | `MDB_MCP_CONFIRMATION_REQUIRED_TOOLS`               | `"atlas-create-access-list,atlas-create-db-user,drop-database,drop-collection,delete-many,drop-index"` | Comma separated values of tool names that require user confirmation before execution. Requires the client to support elicitation.                                                               |
 | `connectionString`                     | `MDB_MCP_CONNECTION_STRING`                         | `<not set>`                                                                                            | MongoDB connection string for direct database connections. Optional, if not set, you'll need to call the connect tool before interacting with MongoDB data.                                     |
-| `disableEmbeddingsValidation`          | `MDB_MCP_DISABLE_EMBEDDINGS_VALIDATION`             | `<not set>`                                                                                            | When set to true, disables validation of embeddings dimensions.                                                                                                                                 |
+| `disableEmbeddingsValidation`          | `MDB_MCP_DISABLE_EMBEDDINGS_VALIDATION`             | `false`                                                                                                | When set to true, disables validation of embeddings dimensions.                                                                                                                                 |
 | `disabledTools`                        | `MDB_MCP_DISABLED_TOOLS`                            | `""`                                                                                                   | Comma separated values of tool names, operation types, and/or categories of tools that will be disabled.                                                                                        |
 | `exportCleanupIntervalMs`              | `MDB_MCP_EXPORT_CLEANUP_INTERVAL_MS`                | `120000`                                                                                               | Time in milliseconds between export cleanup cycles that remove expired export files.                                                                                                            |
 | `exportTimeoutMs`                      | `MDB_MCP_EXPORT_TIMEOUT_MS`                         | `300000`                                                                                               | Time in milliseconds after which an export is considered expired and eligible for cleanup.                                                                                                      |

src/common/config.ts

@@ -158,14 +158,13 @@ export const UserConfigSchema = z4.object({
         .register(configRegistry, { isSecret: true }),
     disableEmbeddingsValidation: z4
         .boolean()
-        .optional()
+        .default(false)
         .describe("When set to true, disables validation of embeddings dimensions."),
     vectorSearchDimensions: z4.coerce
         .number()
         .default(1024)
         .describe("Default number of dimensions for vector search embeddings."),
     vectorSearchSimilarityFunction: similarityEnumV4
-        .optional()
         .default("euclidean")
         .describe("Default similarity function for vector search: 'euclidean', 'cosine', or 'dotProduct'."),
     previewFeatures: z4