feat: rename gain value from value to gain_db

Author: eltorio

rust/config.example.yaml

@@ -276,7 +276,7 @@ processing:
     - id: "gain_amplifier"
       node_type: "gain"
       parameters:
-        value: 3.0  # +3 dB gain (approximately 1.41x amplification)
+        gain_db: 3.0  # +3 dB gain (approximately 1.41x amplification)
 
     - id: "streaming_bandpass_filter"
       node_type: "streaming"

rust/resources/config.schema.json

@@ -672,13 +672,13 @@
                         "parameters": {
                           "type": "object",
                           "properties": {
-                            "value": {
+                            "gain_db": {
                               "type": "number",
                               "description": "Gain value in decibels (dB). Positive values amplify, negative values attenuate."
                             }
                           },
                           "required": [
-                            "value"
+                            "gain_db"
                           ],
                           "additionalProperties": false
                         }

rust/src/processing/graph.rs

@@ -1096,10 +1096,11 @@ impl ProcessingGraph {
                     .ok_or_else(|| anyhow::anyhow!("Gain node requires parameters"))?;
 
                 let gain_db = params
-                    .get("value")
+                    .get("gain_db")
                     .and_then(|v| v.as_f64())
-                    .ok_or_else(|| anyhow::anyhow!("Gain node requires 'value' parameter in dB"))?
-                    as f32;
+                    .ok_or_else(|| {
+                        anyhow::anyhow!("Gain node requires 'gain_db' parameter in dB")
+                    })? as f32;
 
                 Ok(Box::new(GainNode::new(config.id.clone(), gain_db)))
             }