Add get_proxy_agent_aggregate_status to remove the disk write-permission dependency

[ZhidongPeng]

• Currently GPA service passes its aggregated status to GPA VM Extension via status.json file, if the status folder is ready-only for whatever reason, GPA VM Extension will not be able to get the latest aggregated status.
• GPA http server starts to accept /gpa-aggregated-status and return current aggregated status in json as response.
• GPA VM Extension first try query the GPA server for aggregated status, if not available, fallback to read the status.json file.
• Update max_binary_bytes for ProxyAgentExt as it starts to static link hyper client.

[Copilot]

Pull request overview

This PR removes the VM extension’s dependency on reading GPA’s aggregated status from a writable status.json by adding a localhost HTTP endpoint that serves the aggregated status, with the extension falling back to file reads if the endpoint is unavailable.

Changes:

• Add a /gpa-aggregated-status endpoint to the proxy agent HTTP server to return the current aggregated status as JSON.
• Add shared client helpers to fetch aggregated status from the server first, then fall back to reading status.json, and update the extension to use this flow.
• Centralize proxy agent IP/port constants in proxy_agent_shared and update binary bloat budgets.

Reviewed changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
proxy_agent/src/proxy/proxy_server.rs	Routes and serves the new aggregated-status endpoint from the GPA HTTP listener.
proxy_agent/src/proxy_agent_status.rs	Refactors status-building helpers and exposes an async aggregate-status getter for the server endpoint.
proxy_agent/src/common/constants.rs	Re-exports proxy agent IP/port from the shared crate to unify constants.
proxy_agent_shared/src/server_mock.rs	Extends the mock server to respond to the new aggregated-status endpoint for tests.
proxy_agent_shared/src/proxy_agent_aggregate_status.rs	Adds the endpoint path constant and server-first/fallback-to-file aggregate-status retrieval helpers.
proxy_agent_shared/src/error.rs	Adds a new error variant for combined server+file aggregate-status retrieval failures.
proxy_agent_shared/src/constants.rs	Defines shared PROXY_AGENT_IP / PROXY_AGENT_PORT.
proxy_agent_extension/src/service_main.rs	Uses server-first aggregate-status retrieval for version checks and status reporting.
proxy_agent_extension/src/error.rs	Adds conversion support for bubbling up proxy_agent_shared::error::Error.
proxy_agent_extension/src/constants.rs	Renames the state event key to reflect aggregate-status retrieval (server/file).
.github/workflows/bloat.yml	Adjusts bloat budget thresholds for ProxyAgentExt builds.

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[Copilot]

Pull request overview

Copilot reviewed 11 out of 11 changed files in this pull request and generated 3 comments.