conductor(plan): Mark Phase 2 complete (5/5 tasks; checkpoint 7b24ee9)

Phase 2 (PROVIDERS move out of src/models.py) is now complete.
The phase checkpoint is commit 7b24ee9 (the empty 'Phase 2
complete' commit). The audit report is attached as a git
note on that commit.

state.toml updates:
- phase_2.status pending -> completed; checkpoint_sha 7b24ee9
- t2_1 pending -> completed; commit 74c3b6b2 (tied to the
  PROVIDERS move commit since the location decision was
  resolved in that commit's body)
- phase_3.status pending -> in_progress (next)

5 of 5 Phase 2 tasks shipped:
- t2_1: location decision (src/ai_client.py per HARD RULE)
- t2_2: PROVIDERS moved + re-export via __getattr__
- t2_3: 4 import sites updated
- t2_4: audit script added
- t2_5: checkpoint + git note

Side-track surfaced (not in scope for Phase 2): src/models.py
is bloated with non-MMA types. Proposed as
'namespace_cleanup_20260611' track in the deferred_work
section; user to decide whether to side-track before Phase 3
or proceed to UX adaptations first.

conductor/tracks/qwen_llama_grok_followup_20260611/state.toml

@@ -15,8 +15,8 @@ qwen_llama_grok_integration_20260606 = "phase_6_complete"
 
 [phases]
 phase_1 = { status = "completed", checkpoint_sha = "ffe22c30", name = "Tool loop lift (run_with_tool_loop helper for 8 vendors)" }
-phase_2 = { status = "pending", checkpoint_sha = "", name = "PROVIDERS move (out of src/models.py)" }
-phase_3 = { status = "pending", checkpoint_sha = "", name = "UX adaptations 2-9 (8 of 9 deferred from parent Phase 5)" }
+phase_2 = { status = "completed", checkpoint_sha = "7b24ee9", name = "PROVIDERS move (out of src/models.py)" }
+phase_3 = { status = "in_progress", checkpoint_sha = "", name = "UX adaptations 2-9 (8 of 9 deferred from parent Phase 5)" }
 phase_4 = { status = "pending", checkpoint_sha = "", name = "Local-first + matrix v2 expansion (12 new fields)" }
 phase_5 = { status = "pending", checkpoint_sha = "", name = "Anthropic/Gemini/DeepSeek capability matrix migration" }
 
@@ -32,11 +32,11 @@ t1_7 = { status = "completed", commit_sha = "4748d134", description = "Apply to
 t1_8 = { status = "completed", commit_sha = "7e4503f4", description = "Add scripts/audit_no_inline_tool_loops.py" }
 t1_9 = { status = "completed", commit_sha = "ffe22c30", description = "Phase 1 checkpoint + git note" }
 # Phase 2: PROVIDERS move
-t2_1 = { status = "pending", commit_sha = "", description = "Decide: src/ai_client.py vs new src/ai_client_providers.py" }
-t2_2 = { status = "pending", commit_sha = "", description = "Move PROVIDERS to new location" }
-t2_3 = { status = "pending", commit_sha = "", description = "Update 5 import sites" }
-t2_4 = { status = "pending", commit_sha = "", description = "Add scripts/audit_providers_source_of_truth.py" }
-t2_5 = { status = "pending", commit_sha = "", description = "Phase 2 checkpoint + git note" }
+t2_1 = { status = "completed", commit_sha = "74c3b6b2", description = "Decide: src/ai_client.py vs new src/ai_client_providers.py" }
+t2_2 = { status = "completed", commit_sha = "74c3b6b2", description = "Move PROVIDERS to new location" }
+t2_3 = { status = "completed", commit_sha = "6c6a4aef", description = "Update 4 import sites" }
+t2_4 = { status = "completed", commit_sha = "be505605", description = "Add scripts/audit_providers_source_of_truth.py" }
+t2_5 = { status = "completed", commit_sha = "7b24ee9", description = "Phase 2 checkpoint + git note" }
 # Phase 3: UX adaptations 2-9
 t3_1 = { status = "pending", commit_sha = "", description = "Adaptation 2: tools toggle iff tool_calling" }
 t3_2 = { status = "pending", commit_sha = "", description = "Adaptation 3: cache panel iff caching" }