refactor(cli): rewrite files, models, adapters and inference on typed clients

[maxdubrinsky]

Summary

Rewrites the files, models, adapters and inference command groups by hand on the typed clients from #1986, replacing their generated Stainless commands. CLI surface, output shapes and exit codes are unchanged; the generated modules are removed and skipped in the generator config.

Changes

• cli/commands/files.py: filesets/files CRUD plus upload/download/list through filesets.transfer (SDK-free since feat(cli): typed-client plumbing for the Stainless-free CLI #1986); files list -f code refuses glob patterns with a usage error instead of emitting code that cannot run.
• files filesets refresh (added to the generated tree by feat(files): serve filesets from GitHub and refresh a tracked revision [ASTD-592] #1957 while this PR was open) is carried over: FilesClient.refresh_fileset posts to the /refresh route and the command renders the returned fileset, same help text and position; wire and endpoint tests added.
• cli/commands/models.py, adapters.py: entity CRUD, create --wait on the shared waiters (tests/cli/commands/test_create_wait.py keeps main's jobs tests and adds the deployment ones).
• cli/commands/inference.py: providers, virtual models, provider readiness and the OpenAI proxy commands on InferenceGatewayClient; streaming uses the raw SSE stream.
• The gateway patch/post/put proxy commands reject --input-data keys other than name/body (the generated commands failed loudly on stray keys; forwarding only body would have posted an empty request), and inference gateway openai v1 models list uses the OpenAI columns (id, owned_by, created) the endpoint returns, matching inference models list on the same route.
• Bodies go through build_request_body; lists through collect_offset_pages.
• manifest_registry.py entries, cli_config.yaml skip: true, cli/commands/api/{files,models,adapters,inference} deleted; wire tests per group.

Stack

Part of the AIRCORE-893 series that moves the nemo CLI off the generated Stainless SDK onto the typed clients in nemo_platform_plugin (blocking AIRCORE-827). Stacked on #1986 (plumbing) but targeted at main so CI runs (the CI workflow only triggers for PRs against main/release/*). Until #1986 merges, the diff includes its commits; this PR's own change is refactor(cli): rewrite files, models, adapters and inference on typed clients. Review that commit, or compare against cli-typed-client-plumbing/mdubrinsky.

1. feat(cli): typed-client plumbing for the Stainless-free CLI #1986 plumbing (typed-client seam, bootstrap, pagination and request-body helpers)
2. In parallel on top of it: refactor(cli): rewrite workspaces, projects and iam on typed clients #1999 core groups 1 (secrets, workspaces, projects, iam), refactor(cli): rewrite files, models, adapters and inference on typed clients #2000 core groups 2 (files, models, adapters, inference), refactor(cli): host guardrail, intake and experiments in their owning packages #2001 plugin-hosted groups (guardrail, intake, experiments), refactor(plugins): type platform handles as PlatformClient across the plugin runtime #2002 plugin runtime typing, refactor(cli): run nemo setup on typed clients #2003 setup
3. refactor(cli)!: drop the generated Stainless command tree and the CLI generator #2004 final flip: drop get_client()'s Stainless path, delete cli/commands/api/* and the CLI generator

Status: draft. Being maintained by an agent on behalf of @mdubrinsky; it re-bases on #1986 as that moves and on @ironcommit's landing plugin migrations (#1971, #1973), and picks up CI and review feedback. It will be re-cut where those PRs overlap (noted per PR below).

Type of Change

• Code change (feature, bug fix, or refactor)
• Code change with documentation updates
• Documentation only
• Contributor tooling or automation
• CI, build, or test infrastructure

Quality Gates

• Tests added or updated for changed behavior
• Existing tests cover changed behavior — justification:
• Tests not applicable — justification:
• Documentation updated for user-visible behavior
• Documentation not applicable — justification: no user-visible CLI change; --help output and docs/cli/reference.mdx are unchanged.

Verification

• Pull request title follows the repository's Conventional Commit format
• Every commit includes an appropriate Signed-off-by: trailer
• uv run pre-commit run -a passes, or any blocked checks are identified below
• Targeted tests pass, or tests are marked not applicable above
• No secrets, API keys, or credentials are included

Targeted validation (on the current head, based on #1986 at 6d9822bd6):

• uv run --frozen pytest packages/nemo_platform_ext/tests packages/nemo_platform_plugin/tests -q --deselect packages/nemo_platform_ext/tests/cli/commands/test_services.py --deselect packages/nemo_platform_ext/tests/local/test_services.py (the two deselected files bind ports 8080/9000, which are occupied on the host): 2241 passed (ext CLI, filesets) + 2752 (plugin, models) (plugin, filesets, models) + 1583 (ext CLI).
• uv run --frozen pytest packages/filesets/tests services/core/models/tests/unit -q: passed.
• uv run ruff check and uv run ruff format --check: clean.
• uv run pre-commit run -a: all hooks pass except uv-lock (host uv 0.9.30 vs pinned 0.9.14); uvx --from uv==0.9.14 uv lock --check passes. helm-docs and yq are not installed on the host; both hooks are CI-covered.
• NMP_CONFIG_FILE=/tmp/nope.yaml uv run _nemo <group> --help diffed against main for every rewritten group: identical, except a trailing period on group help lines.

[github-actions]

Suite	Lines Covered	Line Rate	Branch Rate
Unit Tests	46546/58300	79.8%	63.7%
Integration Tests	29187/55558	52.5%	23.9%