fix(test): align session_id→task_id across tests and source files

Several places still emitted task(session_id=...) after the refactor:
- src/hooks/atlas/verification-reminders.ts: 2 occurrences
- src/agents/dynamic-agent-core-sections.ts: buildNonClaudePlannerSection prompt

Tests updated to match: atlas index.test.ts and dynamic-agent-prompt-builder.test.ts

src/agents/dynamic-agent-core-sections.ts

@@ -182,7 +182,7 @@ Multi-step task? **ALWAYS consult Plan Agent first.** Do NOT start implementatio
 
 - Single-file fix or trivial change → proceed directly
 - Anything else (2+ steps, unclear scope, architecture) → \`task(subagent_type="plan", ...)\` FIRST
-- Use \`session_id\` to resume the same Plan Agent - ask follow-up questions aggressively
+- Use \`task_id\` to resume the same Plan Agent - ask follow-up questions aggressively
 - If ANY part of the task is ambiguous, ask Plan Agent before guessing
 
 Plan Agent returns a structured work breakdown with parallel execution opportunities. Follow it.`

src/hooks/atlas/verification-reminders.ts

@@ -29,7 +29,7 @@ Your completion will NOT be recorded until you complete ALL of the following:
 
 If anything fails while closing this out, resume the same session immediately:
 \`\`\`typescript
-task(session_id="${sessionId}", load_skills=[], prompt="fix: checkbox not recorded correctly")
+task(task_id="${sessionId}", load_skills=[], prompt="fix: checkbox not recorded correctly")
 \`\`\`
 
 **Your completion is NOT tracked until the checkbox is marked in the plan file.**
@@ -47,7 +47,7 @@ ${VERIFICATION_REMINDER}
 
 **If ANY verification fails, use this immediately:**
 \`\`\`
-task(session_id="${sessionId}", load_skills=[], prompt="fix: [describe the specific failure]")
+task(task_id="${sessionId}", load_skills=[], prompt="fix: [describe the specific failure]")
 \`\`\`
 
 ${buildReuseHint(sessionId)}`