fix(agy-acp): support .db conversation format (agy v1.0.4) #841

Job	Run time
smoke-test (Dockerfile.claude, -claude, claude-agent-acp)	3m 46s
smoke-test (Dockerfile.cursor, -cursor, cursor-agent, acp)	2m 51s
smoke-test (Dockerfile.codex, -codex, codex-acp)	3m 43s
smoke-test (Dockerfile.antigravity, -antigravity, agy-acp)	3m 25s
smoke-test (Dockerfile.opencode, -opencode, opencode, acp)	3m 24s
smoke-test (Dockerfile.grok, -grok, grok, agent stdio)	3m 17s
smoke-test (Dockerfile.pi, -pi, pi-acp)	3m 47s
smoke-test (Dockerfile.gemini, -gemini, gemini, --acp)	3m 48s
smoke-test (Dockerfile.hermes, -hermes, hermes-acp)	4m 55s
smoke-test (openshell/Dockerfile, -native-sandbox, openab-agent)	31s
smoke-test (Dockerfile.copilot, -copilot, copilot, --acp)	3m 22s
smoke-test (Dockerfile, kiro-cli, acp --trust-all-tools)	3m 49s
	40m 38s

Provide feedback