Fix: Server throws "User Does not have permission to access this" occasionally (arrow flight endpoint)

[dharanad]

WIP

Fixes #822

Description

When the parsable instance starts, it creates a session key for the admin user (of type SessionKey::BasicAuth) and adds it to the active session. This allows querying via Arrow Flight, as the session key is recognized as active.

However, when the admin user logs in, the admin session key (of type SessionKey::BasicAuth) is removed from the active session and new admin session of type SessionKey::SessionId is added. Consequently, any subsequent queries by clients using Arrow Flight fail the authentication step because the handler create a session key of type SessionKey::BasicAuth and tries to lookup in the map which fails for obvious reasons.

To address this, override permissions if the session key belongs to the user. This ensures that user sessions are maintained even if the admin logs in or logs out, preventing disruptions in client access via Arrow Flight.

Other Approach

• To maintain a mapping for SessionKey::BasicAuth to SessionKey::SessionId. If map get operation fails for type BasicAuth we retrived the SessionId if exists and check if session id exists in active sessions.
• Implement a hash function which yeilds same hash value for BasicAuth and SessionId if they belong to same user.

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This PR has:

• been tested to ensure log ingestion and log query works.
• added comments explaining the "why" and the intent of the code wherever would not be obvious for an unfamiliar reader.
• added documentation for new or modified features or behaviors.

[github-actions]

CLA Assistant Lite bot All contributors have signed the CLA ✍️ ✅

[dharanad]

I have read the CLA Document and I hereby sign the CLA

[nitisht]

@nikhilsinhaparseable PTAL

[nikhilsinhaparseable]

LGTM