feat(mcp): remote instance (device) read tools

[andypalmi]

Summary

Phase 1 read-only MCP tools for the remote instance (device) resource, added to forge/ee/lib/mcp/tools/devices.js:

• platform_get_remote_instance_audit_log - GET /devices/:deviceId/audit-log
• platform_export_remote_instance_audit_log - GET /devices/:deviceId/audit-log/export
• platform_get_remote_instance_history - GET /devices/:deviceId/history
• platform_list_remote_instance_http_tokens - GET /devices/:deviceId/httpTokens
• platform_list_team_provisioning_tokens - GET /teams/:teamId/devices/provisioning

Each tool describes the device resource, so all are filed with the existing device tools, following the one-file-per-resource convention. All tools are annotated readOnlyHint: true, destructiveHint: false.

Device history is plan-gated on feature key projectHistory (defaults to enabled); when disabled the route returns a 404 regardless of the caller's permissions, so the tool surfaces a clear "feature not enabled for this team" message instead of a bare not-found. platform_list_team_provisioning_tokens returns the summary view, which omits the token secret.

Scopes allow-listed in IMPLICIT_TOKEN_SCOPES['user:expert-mcp'] (forge/routes/auth/permissions.js):

• device:audit-log
• project:history
• team:device:provisioning-token:list

(device:edit was already present from the shipped device tools.)

Write, delete, and credential-issuing endpoints for this resource are out of scope for this PR.

Closes #7708

Test plan

• eslint on changed files passes with no errors
• CI

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 75.54%. Comparing base (103f9ae) to head (4cc7f56).

Additional details and impacted files

@@                        Coverage Diff                        @@
##           feat/mcp-tools-shared-schemas    #7726      +/-   ##
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+ Coverage                          75.41%   75.54%   +0.12%     
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  Files                                426      426              
  Lines                              22551    22572      +21     
  Branches                            5949     5949              
=================================================================
+ Hits                               17006    17051      +45     
+ Misses                              5545     5521      -24     

Flag	Coverage Δ
backend	75.54% <100.00%> (+0.12%)	⬆️

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