chore(cli): bump to v0.2.5 + changelog + ruff format fix

- Python: 0.2.4 → 0.2.5 in cli/python/pyproject.toml
- Node:   0.2.4 → 0.2.5 in cli/node/package.json
- docs/changelog/sdk.mdx: new CLI v0.2.5 entry (Agent Mode bootstrap,
  --agent-caller, mem0 identify, plugin sync, claim flow, pingKey fix,
  rate-limit clarity, JSON envelope command field, envelope validation)
- CI fix: ruff format applied to config.py + test_init_internals.py

Release flow: merge → tag cli-v0.2.5 (Python CD) and cli-node-v0.2.5
(Node CD) on GitHub Releases. OIDC trusted publishing — no tokens needed.

cli/python/src/mem0_cli/config.py

@@ -31,7 +31,9 @@ class PlatformConfig:
     # Agent Mode (unclaimed-shadow signup)
     agent_mode: bool = False  # True while the key is an unclaimed agent-mode key
     created_via: str = ""  # "agent_mode" | "email" | "api_key" | "existing_key"
-    agent_caller: str = ""  # canonical agent name when created_via == "agent_mode" (e.g. "claude-code")
+    agent_caller: str = (
+        ""  # canonical agent name when created_via == "agent_mode" (e.g. "claude-code")
+    )
     claimed_at: str = ""  # ISO timestamp once the agent has been claimed by a human
     default_user_id: str = ""  # `user_<slug>` returned by bootstrap; used as auto-default