Phase 5b: CLI integration tests (27) + Python bindings (797 LOC)

gp-cli integration tests (939 LOC, 27 tests):
- Full binary-level testing via std::process::Command
- Each test in isolated tempdir for parallelism
- Coverage: init, add-drawer, search (TF-IDF ranking), navigate,
  status, wing/room CRUD, kg add/query, export/import, pheromones,
  agents, help/version, full end-to-end workflow
- Uses tempfile crate for test isolation

gp-python bindings (797 LOC, 22 methods):
- Palace class with Mutex<SendablePalace> for thread safety
- Full API: add_drawer, search, navigate, status, wing/room CRUD,
  knowledge graph, similarity graph, pheromones, export/import
- TF-IDF vocabulary rebuild on load (same as CLI)
- Auto-save after every mutation
- Edition 2021 for PyO3 0.22 compat (unsafe-op-in-unsafe-fn)
- cargo check + clippy -D warnings: zero issues

Total: 707 tests, zero failures, zero clippy warnings.
15 Rust crates in workspace (was 13).

Author: web3guru888

rust/Cargo.toml

@@ -12,6 +12,7 @@ members = [
     "gp-palace",
     "gp-bench",
     "gp-cli",
+    "gp-python",
 ]
 resolver = "2"
 

rust/gp-cli/Cargo.toml

@@ -32,3 +32,7 @@ serde_json.workspace = true
 anyhow.workspace = true
 toml = "0.8"
 rand = { workspace = true }
+
+[dev-dependencies]
+tempfile = "3"
+serde_json = { workspace = true }