Feat/snapshot registry 976

[Miracle656]

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TITLE:

feat(debug): Add SnapshotRegistry Interface - Issue #976

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DESCRIPTION:

Overview

Implements a centralized SnapshotRegistry interface in internal/debug for storing and retrieving snapshots fetched
during a session, decoupling UI components from storage implementation.

Changes

Core Implementation

• SnapshotRegistry: New interface defined in internal/debug/registry.go

  • Add(id string, snap *snapshot.Snapshot) — stores a snapshot by ID
  • Get(id string) (*snapshot.Snapshot, bool) — retrieves a snapshot by ID
  • ListIDs() []string — returns all stored IDs in insertion order
  • Clear() — removes all snapshots from the registry

• snapshotRegistry: Private in-memory implementation of the interface

  • sync.RWMutex for safe concurrent access
  • Insertion-order preserved via a separate ordering slice
  • Overwrites existing entry on duplicate ID without changing order

• Factory Function: NewSnapshotRegistry() returns a ready-to-use registry

  • Returns the interface type, keeping the implementation private
  • Zero dependencies beyond internal/snapshot

Security Properties

• No key material or sensitive data stored
• Concurrent-safe via read/write mutex
• No external I/O — purely in-memory

Related Issues

Closes #976

Type of Change

• New feature
• Bug fix
• Breaking change
• Documentation update

Checklist

• Code follows project style guidelines
• Self-review completed
• Interface is clean and well-documented
• Decouples UI from storage implementation
• No new linting issues
• Changes verified locally

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[dotandev]

fix ci and conflicts.