chore(release): v152.0.4-beta.31, pythonlib 0.5.6

Browser: beta.31, cut from the integration merge in 35b45c1 (#756). Tagging
publishes it as a prerelease; beta.30 stays the latest stable release.

pythonlib: 0.5.6b1 -> 0.5.6. The pre-release existed because
PLAYWRIGHT_BROWSER_FLOORS pins Playwright >= 1.61 to browser beta.30, and
beta.30 was itself only a prerelease, so the floor pointed at a build the
resolver would not hand to users. beta.30 is now the latest stable release, so
the floor resolves and 0.5.6 can ship as final.

Verified on linux x86_64 before cutting:
  build-tester      all categories pass; the one varying slot is a
                    cross-profile uniqueness collision across 3 random draws
                    (macOS Screen, then Linux Screen, then macOS Canvas over
                    three runs), not a regression
  patch guards      16/16
  Playwright suite  13 failed, 1083 passed vs stock beta.30's 14/1082
  pythonlib tests   209 passed

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01W2RfR387Mh1JhZ9LZvkptP

pythonlib/pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "poetry.core.masonry.api"
 
 [tool.poetry]
 name = "camoufox"
-version = "0.5.6b1"
+version = "0.5.6"
 description = "Wrapper around Playwright to help launch Camoufox"
 authors = ["daijro <daijro.dev@gmail.com>"]
 license = "MIT"

upstream.sh

@@ -1,3 +1,3 @@
 version=152.0.4
-release=beta.30
+release=beta.31
 closedsrc_rev=1.0.0