chore(oss): audit the server package and resync the SDK mirrors

Split the 657-line operation service into eor, submit, and verify
modules, add the AGENT_REVOKED and KEY_RETIRED codes the Backend already
emits, and condense every multi-line comment. Mirror Node, Python, and
Go at 2.1.0 with the deep-health 503, non-idempotent retry, rotation
grace, and path-encoding fixes. Document which routes and response
fields the self-hosted server does not provide.

Claude-Session: https://claude.ai/code/session_01Agoc9bRVE9KL7mmWtey9Vq

sdks/python/tests/runtime_removal_support.py

@@ -0,0 +1,83 @@
+from __future__ import annotations
+
+import argparse
+import base64
+import hashlib
+import json
+import os
+from pathlib import Path
+from typing import Any
+
+import pytest
+
+from elydora import cli
+
+
+AGENT_ID = "agent-1"
+AGENT_NAME = "opencode"
+PRIVATE_KEY = base64.urlsafe_b64encode(bytes([19]) * 32).rstrip(b"=").decode()
+
+
+def set_home(monkeypatch: pytest.MonkeyPatch, home: Path) -> None:
+    monkeypatch.setenv("HOME", str(home))
+    monkeypatch.setenv("USERPROFILE", str(home))
+
+
+def write_json(path: Path, value: Any) -> None:
+    path.parent.mkdir(parents=True, exist_ok=True)
+    path.write_text(json.dumps(value, indent=2) + "\n", encoding="utf-8")
+
+
+def write_secret(path: Path, value: str) -> None:
+    path.write_text(value, encoding="utf-8")
+    if os.name != "nt":
+        path.chmod(0o600)
+
+
+def write_error_log(path: Path, chunks: int = 1) -> str:
+    digest = hashlib.sha256()
+    block = b"opaque historical error\n" * 4096
+    with path.open("wb") as file:
+        for _index in range(chunks):
+            file.write(block)
+            digest.update(block)
+    if os.name != "nt":
+        path.chmod(0o600)
+    return digest.hexdigest()
+
+
+def stream_digest(path: Path) -> str:
+    digest = hashlib.sha256()
+    with path.open("rb") as file:
+        while chunk := file.read(1024 * 1024):
+            digest.update(chunk)
+    return digest.hexdigest()
+
+
+def prepare_runtime(
+    monkeypatch: pytest.MonkeyPatch,
+    tmp_path: Path,
+    *,
+    agent_name: str = AGENT_NAME,
+) -> tuple[Path, Path]:
+    home = tmp_path / "home"
+    root = home / ".elydora"
+    agent = root / AGENT_ID
+    set_home(monkeypatch, home)
+    write_json(
+        agent / "config.json",
+        {"agent_id": AGENT_ID, "agent_name": agent_name},
+    )
+    return root, agent
+
+
+def uninstall_args(agent_name: str = AGENT_NAME) -> argparse.Namespace:
+    return cli.build_parser().parse_args(
+        [
+            "uninstall",
+            "--agent",
+            agent_name,
+            "--agent_id",
+            AGENT_ID,
+        ]
+    )