Fix Data Browser bugs for large datasets and query handling

[Jeremy (mrjeremystookey)]

Summary

This PR contains critical bug fixes for the Data Browser:

• Fix OutOfMemoryError: Disable dropdown menu for datasets with >1000 documents to prevent memory crashes
• Fix DQL syntax errors: Use client-side filtering for simple ID searches instead of passing them as invalid DQL queries
• Fix error handling: Add try-catch and error display for invalid DQL queries
• Fix initial load: Auto-select first document when data loads

Changes

Bug Fixes:

1. Prevents OutOfMemoryError by conditionally disabling dropdown for large datasets
2. Detects whether user input is a simple ID search or DQL query
3. Uses client-side filtering for simple ID searches to avoid DQL parsing errors
4. Shows error messages when invalid DQL queries are entered
5. Auto-selects first document on load instead of showing "select"

Test plan

• Test simple ID search (e.g., "abc123") filters correctly without errors
• Test DQL queries (e.g., id == "value") work as expected
• Verify invalid DQL queries show appropriate error messages
• Confirm first document is auto-selected on initial load