Add comprehensive security tests for OWASP A02, A05, A07, and A08 categories

- Implemented tests for Cryptographic Failures (A02) to ensure proper handling of sensitive data, secure algorithms, and key management.
- Added tests for Security Misconfiguration (A05) to validate production configurations, security headers, CORS settings, and feature management.
- Developed tests for Authentication Failures (A07) to enforce strong password policies, rate limiting, session management, and MFA support.
- Created tests for Software and Data Integrity Failures (A08) to verify artifact signatures, SBOM integrity, attestation chains, and feed updates.

docs/modules/telemetry/ttfs-architecture.md

@@ -361,7 +361,61 @@ export const TTFS_FIXTURES = {
 };
 ```
 
-## 12) References
+## 12) Observability
+
+### 12.1 Grafana Dashboard
+
+The TTFS observability dashboard provides real-time visibility into signal latency, cache performance, and SLO compliance.
+
+- **Dashboard file**: `docs/modules/telemetry/operations/dashboards/ttfs-observability.json`
+- **UID**: `ttfs-overview`
+
+**Key panels:**
+- TTFS P50/P95/P99 by Surface (timeseries)
+- Cache Hit Rate (stat)
+- SLO Breaches (stat with threshold coloring)
+- Signal Source Distribution (piechart)
+- Signals by Kind (stacked timeseries)
+- Error Rate (timeseries)
+- TTFS Latency Heatmap
+- Top Failure Signatures (table)
+
+### 12.2 Alert Rules
+
+TTFS alerts are defined in `docs/modules/telemetry/operations/alerts/ttfs-alerts.yaml`.
+
+**Critical alerts:**
+| Alert | Threshold | For |
+|-------|-----------|-----|
+| `TtfsP95High` | P95 > 5s | 5m |
+| `TtfsSloBreach` | >10 breaches in 5m | 1m |
+| `FirstSignalEndpointDown` | Orchestrator unavailable | 2m |
+
+**Warning alerts:**
+| Alert | Threshold | For |
+|-------|-----------|-----|
+| `TtfsCacheHitRateLow` | <70% | 10m |
+| `TtfsErrorRateHigh` | >1% | 5m |
+| `FirstSignalEndpointLatencyHigh` | P95 > 500ms | 5m |
+
+### 12.3 Load Testing
+
+Load tests validate TTFS performance under realistic conditions.
+
+- **Test file**: `tests/load/ttfs-load-test.js`
+- **Framework**: k6
+
+**Scenarios:**
+- Sustained: 50 RPS for 5 minutes
+- Spike: Ramp to 200 RPS
+- Soak: 25 RPS for 15 minutes
+
+**Thresholds:**
+- Cache-hit P95 ≤ 250ms
+- Cold-path P95 ≤ 500ms
+- Error rate < 0.1%
+
+## 13) References
 
 - Advisory: `docs/product-advisories/14-Dec-2025 - UX and Time-to-Evidence Technical Reference.md`
 - Sprint 1 (Foundation): `docs/implplan/SPRINT_0338_0001_0001_ttfs_foundation.md`
@@ -371,3 +425,6 @@ export const TTFS_FIXTURES = {
 - TTE Architecture: `docs/modules/telemetry/architecture.md`
 - Telemetry Schema: `docs/schemas/ttfs-event.schema.json`
 - Database Schema: `docs/db/schemas/ttfs.sql`
+- Grafana Dashboard: `docs/modules/telemetry/operations/dashboards/ttfs-observability.json`
+- Alert Rules: `docs/modules/telemetry/operations/alerts/ttfs-alerts.yaml`
+- Load Tests: `tests/load/ttfs-load-test.js`