fix: resolve merge conflicts — restore simplified state from PR branch

merge: simplify — remove unused features, integrations, and SDK packages (#4)

fix: address PR review issues before merge

refactor: use Claude Code subscription (OAuth) exclusively

simplify: remove unused features, integrations, and SDK packages

fix: disable tools and increase max_turns for chat SDK path

debug: verbose chat SDK message tracing

debug: add print-level tracing to chat SDK calls

fix: handle SDK errors and empty results in chat handler

fix: pass env + cli_path to chat SDK call (same as agent runner)

fix: handle None reply in split_message

fix: retry without session resume when CLI fails with stale session

fix: find bundled claude CLI when not on PATH (Docker)

fix: flag_modified on metadata_ so SQLAlchemy persists JSON changes

fix: robust JSON extraction from enrichment LLM response