fix: address installation failures and SDK bugs (#100)

Bug 1 — Document Rust toolchain requirement:
- Add `maturin develop` step to README, installation docs (all 3
  sections), and quickstart.sh
- Note PYO3_USE_ABI3_FORWARD_COMPATIBILITY for Python 3.14+

Bug 2 — Fix namespace package conflict:
- Move force-include targets from openjarvis/ to _node_modules/ in
  pyproject.toml to prevent editable-install namespace shadowing
- Add fallback path resolution in claude_code.py and
  whatsapp_baileys.py for wheel installs

Bug 3 — Fix trace debugger "No traces yet":
- Enable traces by default (TracesConfig.enabled = True)
- Fix api_routes.py: use store.list_traces() not .recent(),
  dataclasses.asdict() not .to_dict(), get store from app.state
- Wire TraceStore into app.state in app.py

Bug 4 — Fix thinking models returning empty responses:
- Remove hardcoded enable_thinking: False from _openai_compat.py
  that suppressed Qwen3/DeepSeek-R1 output on OpenAI-compatible
  engines (vLLM, SGLang, llama.cpp)

Closes #100

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

scripts/quickstart.sh

@@ -146,6 +146,12 @@ info "Installing Python dependencies..."
 uv sync --extra server --quiet 2>/dev/null || uv sync --extra server
 ok "Python dependencies installed"
 
+# ── 7b. Build Rust extension ──────────────────────────────────────
+info "Building Rust extension..."
+uv run maturin develop -m rust/crates/openjarvis-python/Cargo.toml --quiet 2>/dev/null \
+  || uv run maturin develop -m rust/crates/openjarvis-python/Cargo.toml
+ok "Rust extension built"
+
 # ── 8. Install frontend dependencies ────────────────────────────────
 info "Installing frontend dependencies..."
 (cd frontend && npm install --silent 2>/dev/null || npm install)