Version 0.4.0

Changes:
- put ObservabilityMiddleware before ExceptionHandlerMiddleware to avoid repetative code
- add application startup and last metrics update metrics along with CPU usage metric and threads count
- move host and port to new uvicorn section at config along with new reload and forwarded_allow_ips
- add request_id and remove trace_id/span_id generation if tracing is disabled
- move logging logic from utils to observability
- pass trace_id/span_id in HEX form

{{project_slug}}/observability/config.py

@@ -0,0 +1,49 @@
+"""Observability config is defined here."""
+
+from dataclasses import dataclass, field
+from typing import Literal
+
+LoggingLevel = Literal["DEBUG", "INFO", "WARNING", "ERROR", "CRITICAL"]
+
+
+@dataclass
+class ExporterConfig:
+    endpoint: str
+    level: LoggingLevel = "INFO"
+    tls_insecure: bool = False
+
+
+@dataclass
+class FileLogger:
+    filename: str
+    level: LoggingLevel
+
+
+@dataclass
+class LoggingConfig:
+    root_logger_level: LoggingLevel = "INFO"
+    stderr_level: LoggingLevel | None = None
+    exporter: ExporterConfig | None = None
+    files: list[FileLogger] = field(default_factory=list)
+
+    def __post_init__(self):
+        if len(self.files) > 0 and isinstance(self.files[0], dict):
+            self.files = [FileLogger(**f) for f in self.files]
+
+
+@dataclass
+class PrometheusConfig:
+    host: str
+    port: int
+
+
+@dataclass
+class JaegerConfig:
+    endpoint: str
+
+
+@dataclass
+class ObservabilityConfig:
+    logging: LoggingConfig
+    prometheus: PrometheusConfig | None = None
+    jaeger: JaegerConfig | None = None