[BUG] Path prefix search uses LIKE without directory boundary, matching unintended directories

[Cute0110]

Project

vgrep

Description

The path prefix search uses a SQL LIKE pattern without ensuring directory boundaries, causing unintended matches with similarly-named directories.

Error Observation

Searching with path prefix /home/user/proj also matches /home/user/project, /home/user/proj-backup, etc.

Error Message

Debug Logs

System Information

Version: 0.1.0

## Operating System
  OS: Ubuntu 24.04.3 LTS
  Kernel: 6.8.0-79-generic
  Arch: x86_64

## Hardware
  CPU: AMD Ryzen 9 5950X 16-Core Processor (4 cores)
  RAM: 11 GB

## Build Environment
  Rust: rustc 1.92.0 (ded5c06cf 2025-12-08)
  Target: x86_64

Screenshots

No response

Steps to Reproduce

1. Index two directories: /home/user/proj and /home/user/project
2. Search with path prefix /home/user/proj
3. Observe that results include files from both directories

Code in src/core/db.rs line 162:

let path_prefix_str = path_prefix.to_string_lossy();
let like_pattern = format!("{}%", path_prefix_str);

### Expected Behavior

Should add trailing slash to ensure only files within the exact directory are matched.

### Actual Behavior

Search results include files from sibling directories with similar name prefixes.

### Additional Context

_No response_

[echobt]

Issue validated. The reported problem has been confirmed in the codebase. A Pull Request with the fix has been submitted: CortexLM/vgrep#27.