Detect Sse

Detect slow-slip events from DART + tide gauge residuals.

Runs the complete detection pipeline:

1. Fetch or generate DART bottom pressure + tide gauge data
2. Remove astronomical tides (37-constituent harmonic analysis)
3. Apply inverse barometer correction (tide gauge)
4. Detect anomalous transients in residuals
5. Cross-validate across data sources
6. Estimate SSE parameters (slip, Mw, propagation)
7. Assess megathrust stress loading

Returns all 24 features plus detection summary.

Pricing: Included in subscription tiers (legacy list price: GET /api/v1/billing/pricing).

Request body::

{
    "lat": 45.857,
    "lon": -128.775,
    "zone": "cascadia",
    "duration_days": 42,
    "sse_amplitude_cm": 2.5,
    "threshold_sigma": 2.5,
    "use_demo": true
}