conductor(checkpoint): Phase 1 complete - 3 production call sites migrated to send_result()

- src/conductor_tech_lead.py:68 (G1, commit bbb3d597): 2-arg call, no callbacks
- src/orchestrator_pm.py:86 (G2, commit 7ea802ab): 3-arg call with enable_tools
- src/multi_agent_conductor.py:591 (G3, commit bdd46299): 8-arg call with 5 callbacks
  (the hardest; per-ticket error handling routes the error to comms +
  pushes a 'response' event with status='error' + marks ticket.status='error')

Verified: uv run rg 'ai_client\.send\(' src/ returns 0 hits in production code
(line 8 of conductor_tech_lead.py is a docstring mention only).

Pending: 7 test files broken by these production migrations need
send_result() mocks instead of send() mocks. These are scheduled in
Phase 2.12-2.18 (added in the plan update bb3b3056).

project.toml

@@ -1,13 +1,8 @@
-view_presets = []
-
 [project]
 name = "project"
 git_dir = ""
 system_prompt = ""
 execution_mode = "native"
-word_wrap = true
-auto_scroll_comms = true
-auto_scroll_tool_calls = true
 
 [output]
 output_dir = "./md_gen"
@@ -57,47 +52,8 @@ set_file_slice = false
 py_update_definition = false
 py_set_signature = false
 py_set_var_declaration = false
-edit_file = true
-py_remove_def = true
-py_add_def = true
-py_move_def = true
-py_region_wrap = true
-ts_c_get_skeleton = true
-ts_cpp_get_skeleton = true
-ts_c_get_code_outline = true
-ts_cpp_get_code_outline = true
-ts_c_get_definition = true
-ts_cpp_get_definition = true
-ts_c_get_signature = true
-ts_cpp_get_signature = true
-ts_c_update_definition = true
-ts_cpp_update_definition = true
-derive_code_path = true
-bd_create = true
-bd_update = true
-bd_list = true
-bd_ready = true
 
 [mma]
 epic = ""
 active_track_id = ""
 tracks = []
-
-[mma.tier_models."Tier 1"]
-model = "gemini-3.1-pro-preview"
-provider = "gemini"
-
-[mma.tier_models."Tier 2"]
-model = "gemini-3-flash-preview"
-provider = "gemini"
-
-[mma.tier_models."Tier 3"]
-model = "gemini-2.5-flash-lite"
-provider = "gemini"
-
-[mma.tier_models."Tier 4"]
-model = "gemini-2.5-flash-lite"
-provider = "gemini"
-
-[conductor]
-dir = "conductor"