feat(dify): identify plugin requests with X-TF-Client-Name/Version

[londondavila]

Search and Fetch calls from the Dify plugin arrive with client_name null, so in telemetry they sit inside the untagged request_origin=api bucket indistinguishable from a hand-written script. Runs were already attributed through the api_integration payload field, but search/fetch and the GET tools have no body to carry it. The server reads X-TF-Client-Name / X-TF-Client-Version on every route (request-source.ts:160), and this plugin hits agent.tinyfish.ai directly.

• _api_headers adds X-TF-Client-Name: dify (bare token, same as the existing api_integration) and X-TF-Client-Version from manifest.yaml; both call sites (_tf_request, run_sse stream) already use it
• PLUGIN_VERSION = yaml.safe_load(manifest)["version"] — pyyaml is the loader the Dify daemon uses on this file and was already a hard transitive dep; now explicit in requirements.txt. Path resolution verified against the daemon's packager/loader: manifest.yaml at the .difypkg root, tools/ one level below, in every runtime mode
• bump 0.0.4 → 0.0.5 in both manifest version fields, matching prior bumps
• .difyignore: tests/, so the new tests don't ship in the marketplace artifact
• tests/test_headers.py: header contract; PLUGIN_VERSION is a real semver present at column 0 of the manifest
• X-TF-Request-Origin deliberately unset — api stays the transport

Prerequisites / footguns

• Attributes new traffic only; existing installs stay unattributed until users update.
• The Dify publish workflow never runs. It lives at dify/.github/workflows/plugin-publish.yml, not the repo root, so GitHub ignores it; marketplace republish is a manual step. Pre-existing, out of scope here, worth its own fix.
• The tests run nowhere automatically: no Dify test workflow, and httpx is only transitive. uv run --with pytest --with httpx --with pyyaml pytest dify/tests.
• client_name is self-reported. Analytics only, never auth or billing.
• ruff findings in tools/run_*.py / get_run.py / list_runs.py are pre-existing and untouched.

Testing: pytest 2 passed, from dify/ and from the repo root.

🤖 Generated with Claude Code

https://claude.ai/code/session_0138Vn8E8TfZkUWd3StqDgjp

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📥 Commits

Reviewing files that changed from the base of the PR and between 496cd63 and b7947fd.

📒 Files selected for processing (7)

• dify/.difyignore
• dify/manifest.yaml
• dify/requirements.txt
• dify/tests/__init__.py
• dify/tests/test_headers.py
• dify/tools/base.py
• dify/tools/constants.py

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