chore: Remove TODO comment and improve FindDbsInPath documentation

[VolodymyrBg]

This commit adds proper documentation to the FindDbsInPath function in v2/snapshot.go,
explaining its purpose and usage. The function is used by various commands to locate
IAVL databases in a given path by finding directories containing changelog.sqlite files.

The TODO comment about merging two functions has been removed as the functions serve
different purposes and should remain separate. FindDbsInPath is used for filesystem
operations while ImportMostRecentSnapshot is used for database operations.

This improves code readability and maintainability without changing any functionality.

Summary by CodeRabbit

• New Features
  • Added a utility that scans specified directories for valid databases.
• Bug Fixes
  • Improved snapshot import functionality by introducing enhanced error handling when a database path is missing.

[coderabbitai]

Walkthrough

This update enhances error handling in the snapshot import process by checking for an empty database path before proceeding. It further introduces a utility function that scans a given directory for IAVL databases indicated by the presence of a changelog.sqlite file. A deprecated TODO comment has been removed from the code.

Changes

File(s)	Summary
v2/snapshot.go	Enhanced error handling in ImportMostRecentSnapshot by checking for an empty database path. Added a new function FindDbsInPath to scan directories for changelog.sqlite files and locate IAVL databases.

Sequence Diagram(s)

sequenceDiagram
    participant U as User/Application
    participant DB as SqliteDb
    U->>DB: Call ImportMostRecentSnapshot(targetVersion, traverseOrder, loadLeaves)
    alt Empty sql.opts.Path
        DB-->>U: Return error "database path is empty"
    else Valid path
        DB->>DB: Acquire read connection
        DB->>DB: Prepare query for snapshot import
        DB-->>U: Return snapshot node, version, and nil error
    end

Loading

sequenceDiagram
    participant U as Caller
    participant FS as File System
    U->>FS: Call FindDbsInPath(structuredPath)
    FS->>FS: Scan directories for "changelog.sqlite"
    FS-->>U: Return list of directories with IAVL databases

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I’m a little rabbit, with ears so keen,
Hop through the code where errors are seen.
A missing path gives me a little scare,
But I scan the fields with flair and care.
With each tiny hop, the changes are fun—
Code and carrots, our work is done! 🐇

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📥 Commits

Reviewing files that changed from the base of the PR and between 0bce70d and b559644.

📒 Files selected for processing (1)

• v2/snapshot.go (2 hunks)

🔇 Additional comments (3)

v2/snapshot.go (3)

366-369: Improved error handling with empty path check.

This addition enhances robustness by validating that the database path isn't empty before proceeding with database operations. The check is correctly positioned before any database interactions occur and follows the fail-fast principle.

---

422-424: Clear and informative function documentation.

The added documentation clearly explains both the purpose of the function and its usage context within the codebase. This improvement aligns with the PR objective to enhance documentation for the FindDbsInPath function.

---

424-439: Well-implemented filesystem traversal logic.

The function implementation correctly uses filepath.Walk to recursively traverse the directory structure, identifying IAVL databases by the presence of changelog.sqlite files. The error handling is comprehensive, and the function returns appropriate results based on the documentation.

✨ Finishing Touches

• 📝 Generate Docstrings

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