Add secret management guide, client-side performance monitoring, and search accessibility enhancements

- Introduced a comprehensive Secret Management Guide detailing best practices, secret classification, development setup, production management, rotation procedures, and emergency protocols.
- Implemented a client-side performance monitoring script to track various metrics including page load performance, paint metrics, layout shifts, and memory usage.
- Enhanced search accessibility with keyboard navigation support for search results, ensuring compliance with WCAG standards and improving user experience.

docs/architecture/README.md

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+# Architecture Decision Records (ADRs)
+
+This directory contains Architecture Decision Records (ADRs) documenting the key architectural decisions made in the ThrillWiki project.
+
+## What is an ADR?
+
+An Architecture Decision Record is a document that captures an important architectural decision made along with its context and consequences.
+
+## Related Documentation
+
+- [Future Work](../FUTURE_WORK.md) - Deferred features and implementation plans
+
+## ADR Index
+
+| ADR | Title | Status | Date |
+|-----|-------|--------|------|
+| [ADR-001](./adr-001-django-htmx-architecture.md) | Django + HTMX Architecture | Accepted | 2025-01 |
+| [ADR-002](./adr-002-hybrid-api-design.md) | Hybrid API Design Pattern | Accepted | 2025-01 |
+| [ADR-003](./adr-003-state-machine-pattern.md) | State Machine Pattern | Accepted | 2025-01 |
+| [ADR-004](./adr-004-caching-strategy.md) | Caching Strategy | Accepted | 2025-01 |
+| [ADR-005](./adr-005-authentication-approach.md) | Authentication Approach | Accepted | 2025-01 |
+| [ADR-006](./adr-006-media-handling-cloudflare.md) | Media Handling with Cloudflare | Accepted | 2025-01 |
+
+## ADR Template
+
+New ADRs should follow this template:
+
+```markdown
+# ADR-XXX: Title
+
+## Status
+
+[Proposed | Accepted | Deprecated | Superseded]
+
+## Context
+
+What is the issue that we're seeing that is motivating this decision or change?
+
+## Decision
+
+What is the change that we're proposing and/or doing?
+
+## Consequences
+
+What becomes easier or more difficult to do because of this change?
+
+## Alternatives Considered
+
+What other options were considered and why were they rejected?
+```
+
+## Decision Status
+
+- **Proposed**: The decision is under discussion
+- **Accepted**: The decision has been accepted and implemented
+- **Deprecated**: The decision is no longer relevant
+- **Superseded**: The decision has been replaced by a newer ADR