fix(claude): bump adapter + claude-code to unblock Opus 4.7

Before this change, `openab-claude:0.7.8-beta.7` ships:
  - claude-agent-acp@0.25.0 — hardcoded model list, no Opus 4.7
  - claude-code@2.1.104     — knows up to Opus 4.6 only
  - ENV CLAUDE_CODE_EXECUTABLE=/usr/local/bin/claude (openabdev#447)

With openabdev#447 making the pinned claude-code binary load-bearing, neither
the adapter's availableModels nor the CLI's model resolver knows about
Opus 4.7 — users get Sonnet 4.6 regardless of ANTHROPIC_MODEL=opus.

This PR:
  - introduces `CLAUDE_AGENT_ACP_VERSION` ARG (pattern parity with
    `CLAUDE_CODE_VERSION` from openabdev#326/openabdev#412)
  - bumps adapter 0.25.0 → 0.29.2 (brings claude-agent-sdk 0.2.111+
    whose availableModels includes Opus 4.7)
  - bumps claude-code 2.1.104 → 2.1.114

anthropics/claude-code#49512 (parallel-mkdir ENOENT race) was filed
against 2.1.112 and is still OPEN but has zero comments. Inspection
of the 2.1.114 install shows the CLI moved to a per-platform native
binary (openabdev#2.1.113) and session state relocated from
`/tmp/claude-<uid>/…/tasks/` to `$HOME/.claude/{projects,tasks}/`,
so the vulnerable filesystem layout no longer exists — binary-grep
for `/home-//tasks` returns 0 matches. 50 parallel `claude -p` calls
as the same user (40ms stagger) produced 0/50 errors, 0 bytes stderr,
and no `/tmp/claude-*` directories.

Refs openabdev#326, openabdev#412, openabdev#418, openabdev#447
Closes nothing explicitly (no issue filed; repro + rationale in body).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: brettchien

Dockerfile.claude

@@ -13,8 +13,9 @@ RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates
 # Install claude-agent-acp adapter and Claude Code CLI.
 # Without CLAUDE_CODE_EXECUTABLE the adapter uses its own bundled SDK cli.js,
 # ignoring the globally installed claude-code binary (see #418).
-ARG CLAUDE_CODE_VERSION=2.1.104
-RUN npm install -g @agentclientprotocol/claude-agent-acp@0.25.0 @anthropic-ai/claude-code@${CLAUDE_CODE_VERSION} --retry 3
+ARG CLAUDE_AGENT_ACP_VERSION=0.29.2
+ARG CLAUDE_CODE_VERSION=2.1.114
+RUN npm install -g @agentclientprotocol/claude-agent-acp@${CLAUDE_AGENT_ACP_VERSION} @anthropic-ai/claude-code@${CLAUDE_CODE_VERSION} --retry 3
 ENV CLAUDE_CODE_EXECUTABLE=/usr/local/bin/claude
 
 # Install gh CLI