release: v0.20.1 — httpx promoted to runtime dep (fixes pip install)

Hotfix for v0.20.0. Fresh-venv smoke caught a packaging bug:

  pip install carl-studio==0.20.0
  python -c 'from carl_studio.entitlements import EntitlementsClient'
  → ModuleNotFoundError: No module named 'httpx'

The v0.20 modules (entitlements, telemetry/axon, adapters/slime_submit,
fsm_ledger_forward) all import httpx at module top because they instantiate
httpx.Client in __init__. httpx was only listed under [dev] extras,
so a fresh runtime install couldn't import these modules at all.

Fix: promote httpx>=0.27 to runtime dependencies in pyproject.toml.
Also bumps carl-core minimum to 0.2.0 (was >=0.1.0; now correctly
reflects that v0.20 uses the new error-class surface from carl-core
0.2.0).

uv.lock: regenerated. Same 264 resolved packages, just adds httpx
to the carl-studio dep tree at runtime instead of dev-only.

Tag v0.20.1 ships after this merges.

Author: wheattoast11

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "carl-studio"
-version = "0.20.0"
+version = "0.20.1"
 description = "CARL (Coherence-Aware Reinforcement Learning) — information-theoretic reward signals for LLM training via token-level probability distributions"
 readme = "README.md"
 license = "MIT"
@@ -51,14 +51,20 @@ classifiers = [
 ]
 
 dependencies = [
-    "carl-core>=0.1.0",
+    "carl-core>=0.2.0",
     "pydantic>=2.9",
     "pydantic-settings>=2.0",
     "typer>=0.12",
     "rich>=14.0",
     "numpy",
     "anyio>=4.0",
     "pyyaml>=6.0",
+    # v0.20: entitlements client (EntitlementsClient), AXON forwarder, slime
+    # submit client, and constitutional ledger forwarder all use httpx for
+    # the carl.camp HTTP calls. Promoted from [dev] to runtime so a fresh
+    # `pip install carl-studio` can `from carl_studio.entitlements import
+    # EntitlementsClient` without a separate optional-dep install.
+    "httpx>=0.27",
 ]
 
 [project.urls]

src/carl_studio/__init__.py

@@ -8,7 +8,7 @@
 See also: carl.py (300-line seed crystal at the repo root)
 """
 
-__version__ = "0.20.0"
+__version__ = "0.20.1"
 
 from typing import TYPE_CHECKING