bounty: Add New Relic usage plugin

manifest

@@ -2,4 +2,5 @@
 
 datadog
 mongodb-atlas
+newrelic
 openai

pkg/plugins/newrelic/README.md

@@ -0,0 +1,88 @@
+# New Relic Plugin
+
+The New Relic plugin queries New Relic NerdGraph for billing-related usage data
+and returns OpenCost custom costs. It can report data ingest, core compute,
+advanced compute, and synthetics usage.
+
+New Relic usage query results are approximate and may not exactly match an
+invoice. Set one or more unit price fields to the rates you want OpenCost to
+apply when converting usage into costs.
+
+## Configuration
+
+```json
+{
+  "new_relic_api_key": "NRAK-...",
+  "account_id": 1234567,
+  "region": "us",
+  "data_ingest_price_per_gb": 0.30,
+  "core_ccu_price": 0.05,
+  "advanced_ccu_price": 0.10,
+  "synthetics_price_per_check": 0.001,
+  "custom_usage_queries": [
+    {
+      "name": "cloud",
+      "nrql": "FROM NrConsumption SELECT sum(consumption) AS 'usageQuantity' SINCE '{{start}}' UNTIL '{{end}}' FACET productLine LIMIT MAX",
+      "unit_price": 0.42,
+      "usage_unit": "units",
+      "resource_type": "Cloud Usage",
+      "facet_key": "productLine"
+    }
+  ],
+  "log_level": "info"
+}
+```
+
+For EU accounts, set `"region": "eu"`. To override the NerdGraph endpoint
+directly, set `nerdgraph_api_url`. At least one unit price must be greater than
+zero. Any unit price left as `0` is skipped.
+
+Use `custom_usage_queries` for plan-specific New Relic usage lines that are not
+covered by the defaults. Each custom query must return a numeric
+`usageQuantity`; the plugin multiplies it by `unit_price`. The optional
+`{{start}}` and `{{end}}` placeholders render as the current OpenCost request
+window in New Relic's NRQL date format.
+
+## Data Source
+
+The plugin runs a NerdGraph NRQL query like:
+
+```sql
+FROM NrConsumption
+SELECT sum(GigabytesIngested) AS 'usageQuantity'
+WHERE productLine = 'DataPlatform'
+SINCE '<window-start>'
+UNTIL '<window-end>'
+FACET usageMetric
+LIMIT MAX
+```
+
+```sql
+FROM NrConsumption
+SELECT sum(consumption) AS 'usageQuantity'
+WHERE metric = 'CoreCCU'
+SINCE '<window-start>'
+UNTIL '<window-end>'
+FACET dimension_productCapability
+LIMIT MAX
+```
+
+```sql
+FROM NrConsumption
+SELECT sum(consumption) AS 'usageQuantity'
+WHERE metric = 'AdvancedCCU'
+SINCE '<window-start>'
+UNTIL '<window-end>'
+FACET dimension_productCapability
+LIMIT MAX
+```
+
+```sql
+FROM NrDailyUsage
+SELECT (sum(syntheticsFailedCheckCount) + sum(syntheticsSuccessCheckCount)) AS 'usageQuantity'
+WHERE syntheticsTypeLabel != 'Ping'
+SINCE '<window-start>'
+UNTIL '<window-end>'
+FACET syntheticsTypeLabel
+LIMIT MAX
+```