Merge study-tracker into repo + update exam goal to July 7

- Updated README with combined navigation and exam details
- Updated SCHEDULE.md exam goal from June 30 to July 7, 2026
- Added certifications/roadmap.md with full cert path (A+ → CCNA → AWS → CKA)
- Added certifications/a-plus-core2.md with exam details, domain breakdown,
  practice test log, weak areas, and homelab experience map

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

certifications/a-plus-core2.md

@@ -0,0 +1,63 @@
+# CompTIA A+ Core 2 (220-1202) — Exam Details
+
+## Status
+- **Studying since:** June 11, 2026
+- **Exam goal:** July 7, 2026
+- **Hard deadline:** July 12, 2026
+- **Passing score:** 700 / 900 (~78%)
+- **Format:** 90 questions in 90 minutes
+
+## Study Strategy
+- Took cold diagnostic practice test first to find weak spots
+- Study weak domains first (not start-to-finish)
+- Practice tests every 3–4 days to track improvement
+- Don't schedule the real exam until consistently scoring 85%+ on practice tests
+- July 4th week = buffer week or final prep if needed
+
+## Domain Breakdown
+
+| Domain | Weight | My Confidence | Priority |
+|--------|--------|---------------|----------|
+| Operating Systems | 27% | Medium | High — most content |
+| Security | 24% | High (homelab!) | Medium — review gaps |
+| Software Troubleshooting | 26% | High | Medium — use real experience |
+| Operational Procedures | 23% | Low | High — most memorization |
+
+## Practice Test Log
+
+| Date | Test | Score | Notes |
+|------|------|-------|-------|
+| 2026-06-11 | Sybex diagnostic (cold) | 50% (50/100) | No prior study. Sybex ~60-65% equivalent on real exam |
+
+## Key Weak Areas
+
+- Windows command-line tools: `sfc /scannow`, `DISM`, `chkdsk`, `bootrec`, `diskpart`, `ipconfig /all`, `netstat`, `tracert`, `nslookup`
+- Malware types and the exact removal steps (quarantine order, safe mode boot, etc.)
+- Windows OS editions and what features each one has
+- Operational procedures (safety rules, environmental controls, compliance)
+
+## Study Resources
+
+| Resource | Type | Status |
+|----------|------|--------|
+| Professor Messer | YouTube + paid practice exams | Active |
+| CompTIA CertMaster | Official practice platform | Planned |
+| Sybex | Practice exam book | Used (diagnostic) |
+| Jason Dion | Udemy practice exams | Backup option |
+| r/CompTIA | Community forum | Active |
+| Professor Messer Discord | Study accountability | Active |
+
+## Homelab Experience That Helps
+
+These hands-on KiteStacks experiences map directly to exam topics:
+
+| Homelab Experience | Exam Topic |
+|-------------------|------------|
+| Cloudflare Tunnel setup | Network security, VPN concepts |
+| Authentik SSO (OAuth2, OIDC) | Authentication, authorization, MFA |
+| Tailscale VPN mesh | Remote access, network topology |
+| Docker container management | Virtualization, OS concepts |
+| Linux CLI (daily use) | OS commands, file permissions |
+| Diagnosed OAuth2 distributed bug | Software troubleshooting methodology |
+| RUNBOOK + git change tracking | Documentation, change management |
+| Grafana/Prometheus monitoring | Operational procedures |