feat(tests): archive round history on reopen, stop pausing from setting Jira On Hold

- Reopening a test for rework (red or blue) now archives the round that's
  ending into a new test_round_history table before resetting the live
  fields — procedure/results/detection data is preserved instead of
  overwritten, and Phase Timeline renders every past round alongside the
  current one, so Blue Team keeps visibility into earlier Red attempts.
- Each archived round also posts a permanent Jira comment (push_round_archived)
  since Jira's custom fields only ever show the latest value once the next
  round resubmits — the comment thread is what preserves full history there.
- push_pause_event no longer transitions the Jira issue to "On Hold" — a
  timer pause is not a real Hold, and flipping Jira status for it was
  misleading. Only the explicit Hold action (push_hold_event) does that now.

backend/app/schemas/test.py

@@ -101,6 +101,36 @@ class TestBlueUpdate(BaseModel):
     blue_summary: str | None = None
 
 
+# ── Round history (archived on reopen) ─────────────────────────────
+
+
+class TestRoundHistoryOut(BaseModel):
+    """One archived round snapshot, taken right before a reopen resets the live fields."""
+
+    id: uuid.UUID
+    team: str
+    round_number: int
+    started_at: datetime | None = None
+    ended_at: datetime | None = None
+    paused_seconds: int = 0
+    procedure_text: str | None = None
+    tool_used: str | None = None
+    attack_success: AttackSuccessResult | None = None
+    red_summary: str | None = None
+    execution_start_time: datetime | None = None
+    execution_end_time: datetime | None = None
+    detection_result: TestResult | None = None
+    containment_result: ContainmentResult | None = None
+    detection_time: datetime | None = None
+    containment_time: datetime | None = None
+    blue_summary: str | None = None
+    review_notes: str | None = None
+    reviewed_by: uuid.UUID | None = None
+    archived_at: datetime | None = None
+
+    model_config = ConfigDict(from_attributes=True)
+
+
 # ── Red Lead validation ────────────────────────────────────────────
 
 
@@ -269,6 +299,8 @@ class TestOut(BaseModel):
     red_paused_seconds: int = 0
     # Assign blue_paused_seconds = 0
     blue_paused_seconds: int = 0
+    red_round_number: int = 1
+    blue_round_number: int = 1
 
     # Remediation fields
     remediation_steps: str | None = None
@@ -313,6 +345,9 @@ class TestOut(BaseModel):
     red_evidences: list[EvidenceOut] = []
     blue_evidences: list[EvidenceOut] = []
 
+    # Archived rounds — full history, oldest first (populated from the ORM relationship)
+    round_history: list[TestRoundHistoryOut] = []
+
     model_config = ConfigDict(from_attributes=True)
 
     @model_validator(mode="before")
@@ -369,4 +404,11 @@ class TestOut(BaseModel):
             obj.__dict__["red_evidences"] = red_evs
             obj.__dict__["blue_evidences"] = blue_evs
 
+        # Only populate round history when already loaded (via joinedload)
+        raw_rounds = obj.__dict__.get("round_history")
+        if raw_rounds is not None:
+            obj.__dict__["round_history"] = [
+                TestRoundHistoryOut.model_validate(r) for r in raw_rounds
+            ]
+
         return obj