Trace Postgres and Redis queries with the contrib instrumentations

Builds the TracerProvider in tavolo.telemetry (kaya-otel's is private) and
injects it into kaya-otel, then instruments asyncpg and redis through
opentelemetry-instrumentation-asyncpg/redis. Redis command values are
redacted and asyncpg spans carry the parameterized SQL only.

server/packages/tavolo-app/pyproject.toml

@@ -35,6 +35,8 @@ dev = [
 ]
 otel = [
     "kaya-otel>=0.0.4",
+    "opentelemetry-instrumentation-asyncpg>=0.66b0",
+    "opentelemetry-instrumentation-redis>=0.66b0",
     "opentelemetry-instrumentation-system-metrics>=0.66b0",
 ]