feat(phase-37): timer pause/resume + professional reporting engine

Pause/Resume timer:
- Add paused_at, red_paused_seconds, blue_paused_seconds fields to Test model
- Add pause_timer/resume_timer workflow functions with accumulated pause tracking
- Auto-resume on phase submit; subtract paused time from worklog duration
- Add POST /tests/{id}/pause-timer and resume-timer endpoints
- Update LiveTimer component with pause/resume button and paused visual state
- Wire pause/resume mutations through TestDetailPage and TestDetailHeader

Professional Reporting Engine - Fase 2:
- Add ReportEngine service with Jinja2 HTML rendering, WeasyPrint PDF, and docxtpl DOCX
- Add corporate CSS stylesheet with cover page, data tables, stats grid, findings
- Create purple_campaign, coverage_report, and executive_summary HTML templates
- Add report_generation_service collecting domain data for each report type
- Add professional_reports router: GET /reports/generate/purple-campaign/{id}, coverage-summary, executive-summary
- Add analytics router with flat JSON endpoints for PowerBI: /coverage, /tests, /trends, /operators
- Add advanced_metrics router: /coverage-by-tactic, /never-tested, /avg-validation-time, /detection-rate-trend
- Add weasyprint and docxtpl to requirements.txt
- Add REPORT_TEMPLATES_DIR, REPORT_OUTPUT_DIR, COMPANY_NAME, COMPANY_LOGO_PATH to config

backend/app/config.py

@@ -58,6 +58,12 @@ class Settings(BaseSettings):
     TEMPO_API_TOKEN: str = ""
     TEMPO_DEFAULT_WORK_TYPE: str = "Red Team"
 
+    # ── Reporting ─────────────────────────────────────────────────────
+    REPORT_TEMPLATES_DIR: str = "app/templates/reports"
+    REPORT_OUTPUT_DIR: str = "/tmp/aegis_reports"
+    COMPANY_NAME: str = "Organization"
+    COMPANY_LOGO_PATH: str = "app/templates/reports/assets/logo.png"
+
     # ── Scoring weights (must sum to 100) ────────────────────────────
     SCORING_WEIGHT_TESTS: int = 40
     SCORING_WEIGHT_DETECTION_RULES: int = 20