Fix interface godoc: replace sql.ErrNoRows with ErrNotFound in store contracts

[Copilot]

SessionStore and EmailVerificationStore interface method comments referenced sql.ErrNoRows as the not-found return value, directly contradicting the package's own ErrNotFound sentinel contract defined just above them. This mismatch was the root cause of implementors returning the wrong error.

Changes

• auth/types.go: Updated four method comments to reference ErrNotFound instead of sql.ErrNoRows:
  • SessionStore.FindSessionByID
  • SessionStore.FindSessionByRefreshTokenHash
  • SessionStore.DeleteSession
  • EmailVerificationStore.ConsumeEmailVerification

[Copilot]

Pull request overview

Updates store interface Godoc to consistently document ErrNotFound (the package sentinel error) as the “not found” contract instead of sql.ErrNoRows, aligning implementor expectations with the package’s stated error semantics.

Changes:

• Updated SessionStore method comments to reference ErrNotFound for not-found behavior.
• Updated EmailVerificationStore.ConsumeEmailVerification comment to reference ErrNotFound.

Show a summary per file

File	Description
auth/types.go	Aligns interface method documentation with the package-level ErrNotFound sentinel contract (avoids sql.ErrNoRows in store contracts).

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• Files reviewed: 1/1 changed files
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