Added a /conditions/current endpoint with computed best-guess values for current conditions

README.md

@@ -22,13 +22,18 @@ Example:
 
 ## Endpoints
 
-- `GET /observations/current`
+- `GET /conditions/current`
+- `GET /observations?count=<1..100>&units=<us|metric>`
 - `GET /forecast?timestamp=<RFC3339 timestamp>`
 - `GET /alerts/current`
 
-By default, API output is US units for temperature and wind speed:
-- temperature fields: Fahrenheit (`*F`)
-- wind fields: mph (`*Mph`)
+Default unit behavior:
+- `/conditions/current`: US units
+- `/observations`: metric units
+- `/forecast`: US units
+
+`/conditions/current`, `/observations`, and `/forecast` support `?units=us|metric`.
+`/observations` defaults to `count=5` and validates `count` strictly in range `1..100`.
 
 ## Run