Bundle kaya-otel in the Docker image

The tavolo-app otel extra was never installed: requirements.txt was
locked without it and the Dockerfile installs the local distributions
with --no-deps, so any container with OTEL_ENABLED set died at import
with "kaya-otel is not installed".

Add the extra's full closure (kaya-otel plus its OpenTelemetry/protobuf
dependencies) to the pinned lock and refresh the comments that claimed
the extra had to be added separately.

server/requirements.txt

@@ -1,15 +1,19 @@
 #
 # This file is autogenerated by pip-compile with Python 3.14
-# by the following command:
+# by the following command (run from server/packages/tavolo-app/):
 #
-#    pip-compile --allow-unsafe --extra-index-url=https://pypi.org/simple --index-url=https://gitea.woggioni.net/api/packages/woggioni/pypi/simple --output-file=requirements.txt pyproject.toml
+#    pip-compile --allow-unsafe --extra otel --extra-index-url=https://pypi.org/simple --index-url=https://gitea.woggioni.net/api/packages/woggioni/pypi/simple --output-file=../../requirements.txt pyproject.toml
 #
 # NOTE: the tavolo-platform, tavolo-scopone and tavolo-app sibling packages
 # are NOT pinned here: they are installed from ./packages in the Dockerfile
 # and in development (pip install -e ./packages/tavolo-platform
 # -e ./packages/tavolo-scopone -e ./packages/tavolo-app). All of their
 # third-party dependencies are direct dependencies of tavolo-app, so this
-# lock covers the full closure.
+# lock covers the full closure. The otel extra (kaya-otel and its
+# OpenTelemetry dependencies) IS included, so OTEL_ENABLED works in the
+# Docker image; pip-compile cannot resolve the unpublishable sibling
+# packages, so regeneration drops them from a copy of the input file (the
+# existing pins constrain the rest).
 #
 --index-url https://gitea.woggioni.net/api/packages/woggioni/pypi/simple
 --extra-index-url https://pypi.org/simple
@@ -39,6 +43,8 @@ cryptography==50.0.1
     # via pyjwt
 dictdiffer==0.10.0
     # via aerich
+googleapis-common-protos==1.75.4
+    # via opentelemetry-exporter-otlp-proto-http
 granian==2.8.3
     # via
     #   kaya-rsgi
@@ -62,6 +68,7 @@ kaya-core==0.0.4
     #   kaya-cors
     #   kaya-oidc
     #   kaya-openapi
+    #   kaya-otel
     #   kaya-rsgi
     #   kaya-session
     #   tavolo-app (pyproject.toml)
@@ -71,6 +78,8 @@ kaya-oidc==0.0.4
     # via tavolo-app (pyproject.toml)
 kaya-openapi==0.0.4
     # via tavolo-app (pyproject.toml)
+kaya-otel==0.0.4
+    # via tavolo-app (pyproject.toml)
 kaya-rsgi==0.0.4
     # via tavolo-app (pyproject.toml)
 kaya-session==0.0.4
@@ -80,6 +89,35 @@ kaya-session==0.0.4
     #   tavolo-app (pyproject.toml)
 kaya-session-redis==0.0.4
     # via tavolo-app (pyproject.toml)
+opentelemetry-api==1.45.0
+    # via
+    #   opentelemetry-exporter-http-transport
+    #   opentelemetry-exporter-otlp-proto-http
+    #   opentelemetry-sdk
+    #   opentelemetry-semantic-conventions
+opentelemetry-exporter-http-transport[urllib3]==0.66b0
+    # via opentelemetry-exporter-otlp-proto-http
+opentelemetry-exporter-otlp-common==0.66b0
+    # via opentelemetry-exporter-otlp-proto-http
+opentelemetry-exporter-otlp-proto-common==1.45.0
+    # via opentelemetry-exporter-otlp-proto-http
+opentelemetry-exporter-otlp-proto-http==1.45.0
+    # via kaya-otel
+opentelemetry-proto==1.45.0
+    # via
+    #   opentelemetry-exporter-otlp-proto-common
+    #   opentelemetry-exporter-otlp-proto-http
+opentelemetry-sdk==1.45.0
+    # via
+    #   kaya-otel
+    #   opentelemetry-exporter-otlp-common
+    #   opentelemetry-exporter-otlp-proto-http
+opentelemetry-semantic-conventions==0.66b0
+    # via opentelemetry-sdk
+protobuf==7.36.2
+    # via
+    #   googleapis-common-protos
+    #   opentelemetry-proto
 pwo==0.1.2
     # via
     #   kaya-core
@@ -106,4 +144,10 @@ typing-extensions==4.16.0
     # via
     #   anyio
     #   kaya-core
+    #   opentelemetry-api
+    #   opentelemetry-exporter-otlp-proto-http
+    #   opentelemetry-sdk
+    #   opentelemetry-semantic-conventions
     #   pwo
+urllib3==2.8.0
+    # via opentelemetry-exporter-http-transport