v1.2.1 - Persistent Learning Progression, Dynamic Hints System & Rich Markdown Rendering

This patch release introduces persistent progression tracking, progressive step hints, and improved markdown rendering for an enhanced guided learning experience.

🚀 Key Features

• Persistent Learning Progress: Added a backend ProgressService and database integration to save and sync user completion steps across sessions, allowing users to pause and resume roadmaps seamlessly.
• Dynamic Step Hints System: Implemented progressive help blocks (StepHints) that reveal tips one at a time, moving from minor pointers to complete solutions.
• Instruction Markdown Engine: Extracted step rendering to a dedicated InstructionMarkdown component supporting code blocks, inline commands, and list elements.
• Expanded Verification UI: Redesigned the validation results view (StepValidationResults) to display more comprehensive error details and step-by-step diagnostic feedback.

🔧 Improvements & Robustness

• Added strict parameter checking and edge case handling to the validation engine.
• Expanded mock and integration test coverage across all major validators (asg_replicas, edge_exists, port_denied, redis_key_exists, and table_exists).
• Upgraded local project cleanup and Docker network teardown checks.

What's Changed

• feat(learning): pedagogical validation feedback with pass/fail/error states by @OthmaneZ05 in #64
• feat(learning): progressive step hints with gated solution reveal by @OthmaneZ05 in #65
• feat(learning): persist roadmap progression locally without an account by @OthmaneZ05 in #66
• fix(learning): harden validators against false passes on network and DB checks by @OthmaneZ05 in #67

Full Changelog: v1.2.0...v1.2.1