fix(tools): don't drop a toolset from platform inference when a tool is registered into it (salvage #56480)

[hashbender]

Summary

Fixes the class where an inference-based platform (api_server, and plugin platforms with no explicit platform_toolsets entry) silently loses an entire toolset because _get_platform_tools() reverse-maps the static composite against the registry-merged toolset view.

resolve_toolset("terminal") grows to {terminal, process, read_terminal, close_terminal} once tools are registered, but the hermes-api-server composite enumerates only the static names {terminal, process}. The old all-tools set.issubset() test then failed and dropped the whole terminal toolset from api_server — no log, no error, model just loses terminal.

The fix compares each candidate toolset's static (pre-registry-merge) membership during reverse-mapping via a new include_registry flag on get_toolset()/resolve_toolset(). Registry-added tools stop gating inference but remain exposed (subject to their own check_fn) once the toolset is enabled — matching how explicitly-configured platforms already behave. This fixes the bug class at the reverse-map layer instead of data-patching one composite at a time.

Changes

• toolsets.py: include_registry: bool = True kwarg on get_toolset()/resolve_toolset(), threaded through recursion, the all/* alias, includes, and the hermes-<plugin> fallback. include_registry=False returns the static TOOLSETS view.
• hermes_cli/tools_config.py: the three reverse-map candidate comparisons in _get_platform_tools() resolve the candidate toolset with include_registry=False. Universes stay registry-merged so a platform never under-counts what it provides.
• tests/: behavior-contract tests for the flag + regression tests (default api_server keeps terminal; registering a tool into a toolset doesn't drop it from inference; default-off/restricted toolsets stay off).
• Follow-up (maintainer): docstring precision on get_toolset's None return; AUTHOR_MAP entry for the salvaged contributor commits.

Validation

	Before	After
default api_server terminal in final tool defs	❌ dropped	✅ present
static view excludes registry-only read_terminal	—	✅
default-off (homeassistant/discord) stay off	✅	✅
targeted suite (toolsets + api_server + tools_config)	—	✅ 155 passed
mutation check (revert fix → regression tests fail)	—	✅

Credit

Salvage of NousResearch#56480 by @designnotdrum (root-cause fix) — commits cherry-picked with authorship preserved. Supersedes symptom-patch PRs NousResearch#56735 (@HexLab98) and NousResearch#49626 (@liuhao1024), which data-patched the composites; this fixes the class at the reverse-map layer so no composite needs per-tool maintenance.

Fixes NousResearch#56732
Fixes NousResearch#49622

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Mirror-of: NousResearch#56887
NousResearch#56887