feat(claude_code): support Claude Console organizations via usage_report/claude_code endpoint

[salim8898]

Support Claude Console organizations in the Claude Code plugin.

Claude Console (platform.claude.com) Admin API keys (sk-ant-admin01-...) use a different analytics endpoint than Claude Enterprise (claude.ai) keys. Previously, the plugin only called the Enterprise endpoints (/v1/organizations/analytics/users, /v1/organizations/analytics/summaries, /v1/organizations/analytics/connectors), which require read:analytics scope. Console Admin keys have full access but to a different endpoint: /v1/organizations/usage_report/claude_code.

This PR detects the key type from its prefix at runtime:

• sk-ant-admin01-... (Console) → calls v1/organizations/usage_report/claude_code with starting_at query param, parses the Console response schema
• sk-ant-api01-... (Enterprise) → existing behavior unchanged

For Console orgs, CollectActivitySummary and CollectConnectorUsage are skipped gracefully since those endpoints have no Console equivalent. All Claude Code core metrics (sessions, commits, PRs, lines of code, tool actions) are available in the Console API and mapped to the existing ClaudeCodeUserActivity model. Chat metrics are 0 for Console users.
Does this close any open issues: #8977

Other Information:
Anthropic documentation references:

• Console API: https://docs.anthropic.com/en/api/claude-code-analytics-api
• Admin API key types: https://docs.anthropic.com/en/docs/manage-claude/admin-api-keys