fix: complete Emasoft→AI Maestro prefix cleanup across entire repo

Full repo scan via grep found and fixed ALL remaining wrong prefixes:
- EPA→AMPA in decision-trees-core.md (6), template-bug-report.md (2),
  template-pull-request.md (3)
- ecos_session→amcos_session in amoa_confirm_replacement.py (3)
- ecos_notified→amcos_notified in amoa_confirm_replacement.py (7)
- ecos_notification→amcos_notification in amoa_confirm_replacement.py (1)
- Fixed ruff E741 (ambiguous var 'l'→'lbl') in kanban_manager + sync
- Fixed mypy list-item type error in amoa_aimaestro_sync.py

Verified: zero e-prefix occurrences remain (EAMA/ECOS/EOA/EIA/EPA/EAA/emasoft-*)
CPV validation: 0 CRITICAL, 0 MAJOR, 0 MINOR, 0 NIT, 0 WARNING

Author: Emasoft

scripts/amoa_aimaestro_sync.py

@@ -141,7 +141,7 @@ def sync_task(
     returncode, _, stderr = _run_task_command([
         "upsert",
         "--team", team_id,
-        "--external-ref", task_data["externalRef"],
+        "--external-ref", str(task_data["externalRef"]),
         "--data", json.dumps(task_data),
     ])
 
@@ -240,7 +240,7 @@ def bulk_sync(team_id: str) -> dict[str, int]:
     for issue in github_issues:
         issue_number = issue["number"]
         labels = issue.get("labels", [])
-        label_names = [l.get("name", "") for l in labels]
+        label_names = [lbl.get("name", "") for lbl in labels]
 
         # Skip issues without task labels
         if not any(name.startswith("status:") for name in label_names):

scripts/amoa_kanban_manager.py

@@ -316,9 +316,9 @@ def assign_task_to_agent(issue_number: int, agent_name: str) -> bool:
             title = data.get("title", f"Issue #{issue_number}")
             labels = data.get("labels", [])
             status = "backlog"
-            for l in labels:
-                if l.get("name", "").startswith("status:"):
-                    status = l["name"].removeprefix("status:")
+            for lbl in labels:
+                if lbl.get("name", "").startswith("status:"):
+                    status = lbl["name"].removeprefix("status:")
             sync_task(team_id=TEAM_ID, issue_number=issue_number, issue_title=title, status=status, agent_id=agent_name)
 
     return True