feat(phase-2): workstream 2 — Python SDK (sentryagent-idp)

Sync (requests) and async (httpx) clients with identical API surface
to the Node.js SDK.

Delivered:
- pyproject.toml — python>=3.9, hatchling build, mypy strict config
- types.py — all 14-endpoint request/response dataclasses
- errors.py — AgentIdPError with from_api_error, from_oauth2_error, network_error
- token_manager.py — thread-safe sync TokenManager, 60s refresh buffer
- async_token_manager.py — asyncio-safe AsyncTokenManager (httpx)
- _request.py — shared sync/async request helper (DRY)
- services/agents.py — AgentRegistryClient + AsyncAgentRegistryClient (5 methods each)
- services/credentials.py — CredentialClient + AsyncCredentialClient (4 methods each)
- services/token.py — TokenClient + AsyncTokenClient (introspect + revoke)
- services/audit.py — AuditClient + AsyncAuditClient (query + get)
- client.py — AgentIdPClient + AsyncAgentIdPClient
- __init__.py — barrel exports
- README.md — installation, quick start, full API reference

QA gates:
- mypy --strict: 0 errors (12 source files)
- pytest: 57/57 passed
- Coverage: 90.83% (required >= 80%)
- All 14 endpoints covered (sync + async)
- AgentIdPError raised on all failure paths

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

sdk-python/src/sentryagent_idp/__init__.py

@@ -0,0 +1,82 @@
+"""
+SentryAgent.ai AgentIdP Python SDK.
+
+Provides synchronous and asynchronous clients for the AgentIdP API.
+
+Example (sync)::
+
+    from sentryagent_idp import AgentIdPClient
+
+    client = AgentIdPClient(
+        base_url="http://localhost:3000",
+        client_id="your-agent-id",
+        client_secret="your-client-secret",
+    )
+    result = client.agents.list_agents()
+
+Example (async)::
+
+    from sentryagent_idp import AsyncAgentIdPClient
+
+    client = AsyncAgentIdPClient(
+        base_url="http://localhost:3000",
+        client_id="your-agent-id",
+        client_secret="your-client-secret",
+    )
+    result = await client.agents.list_agents()
+"""
+
+from .client import AgentIdPClient, AsyncAgentIdPClient
+from .errors import AgentIdPError
+from .token_manager import TokenManager
+from .async_token_manager import AsyncTokenManager
+from .types import (
+    Agent,
+    AgentStatus,
+    AgentType,
+    AuditAction,
+    AuditEvent,
+    AuditOutcome,
+    Credential,
+    CredentialStatus,
+    CredentialWithSecret,
+    DeploymentEnv,
+    IntrospectResponse,
+    OAuthScope,
+    PaginatedAgents,
+    PaginatedAuditEvents,
+    PaginatedCredentials,
+    RegisterAgentRequest,
+    TokenResponse,
+    UpdateAgentRequest,
+)
+
+__all__ = [
+    # Clients
+    "AgentIdPClient",
+    "AsyncAgentIdPClient",
+    # Errors
+    "AgentIdPError",
+    # Token managers (for advanced use)
+    "TokenManager",
+    "AsyncTokenManager",
+    # Types
+    "Agent",
+    "AgentStatus",
+    "AgentType",
+    "AuditAction",
+    "AuditEvent",
+    "AuditOutcome",
+    "Credential",
+    "CredentialStatus",
+    "CredentialWithSecret",
+    "DeploymentEnv",
+    "IntrospectResponse",
+    "OAuthScope",
+    "PaginatedAgents",
+    "PaginatedAuditEvents",
+    "PaginatedCredentials",
+    "RegisterAgentRequest",
+    "TokenResponse",
+    "UpdateAgentRequest",
+]