refactor(orchestrator): swap SubprocessBottleRunner → ProgrammaticBottleRunner

BottleRunner Protocol tightened: start() → str, freeze/resume/destroy → None.
RunResult removed. lifecycle.py unpacks the slug directly. FakeRunner and
test_runner updated to match. Config.bot_bottle_cli dropped (nothing uses it).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

bot_bottle/orchestrator/config.py

@@ -26,7 +26,6 @@ class Config:
     watchdog_timeout_secs: int
     webhook_host: str
     webhook_port: int
-    bot_bottle_cli: str
     queue_dir: Path
     sidecar_socket: Path
     db_path: Path | None
@@ -43,7 +42,6 @@ class Config:
             watchdog_timeout_secs=int(e.get("FORGE_WATCHDOG_TIMEOUT", "1800")),
             webhook_host=e.get("FORGE_WEBHOOK_HOST", "127.0.0.1"),
             webhook_port=int(e.get("FORGE_WEBHOOK_PORT", "8477")),
-            bot_bottle_cli=e.get("BOT_BOTTLE_CLI", "cli.py"),
             queue_dir=Path(e.get("FORGE_QUEUE_DIR", str(default_root / "forge-queue"))),
             sidecar_socket=Path(
                 e.get("FORGE_SIDECAR_SOCKET", str(default_root / "forge-sidecar.sock"))