chore: remove pfix dependency (tool retired)

[tom-sapletta-com]

Removes pfix from project dependencies and drops [tool.pfix] config. Nothing in the codebase imports pfix.

[ifuri-validator-agent]

Validator approval after policy checks for exact head ca80e9918dec70547638f406db04719c7bd0ac11.

Ticket: PLF-101
Correlation ID: local-autogrammar-nlp2cmd-pr-10-PLF-101
Model: openrouter/z-ai/glm-5.3-flash
Advisory LLM review: LLM_UNAVAILABLE
Reason: litellm.APIError: APIError: OpenrouterException - {"error":{"message":"Key limit exceeded (total limit). Manage it using https://openrouter.ai/workspaces/default/keys/6c4a486774fb97fb8d24229a61187752dd6c5c85ee2d104af3ef2caad39e1def","code":403}}
This approval rests on the deterministic checks alone; no advisory opinion was recorded for this head.
Semantic review prerequisite: not_required; policy 676cb4516bbfed2a000e40b9b1b6e4a430ecc761ec546aeb53d721a1905cfdd7.

Actual PR impact radar

Exact range: b6b1c2060eb9d1372ff20ad87ced2d9ac3ee156f...ca80e9918dec70547638f406db04719c7bd0ac11
Change digest: 4df57f4d32fc72eef5839ce1545499458342d0b1c7b2e458cdfdc2d044fbe7b2
Score: 32/100 (M), estimated 33 min, split recommended: true
Affected services/components: repository-wide/unclassified

Machine-readable radar JSONL and SVG

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Merge will be attempted after this approval when explicitly authorized. ## Decision record (recomputable)

DECISION D-101-3973
TICKET PLF-101
HEAD_SHA ca80e9918dec70547638f406db04719c7bd0ac11
CORRELATION_ID local-autogrammar-nlp2cmd-pr-10-PLF-101
ACTOR agent:ifuri-validator-agent[bot]
APPLIED_RULE P-CORE-015
INPUT author_login = "tom-sapletta-com"
INPUT observed_checks = ["test (3.11)=PASS","test (3.12)=PASS"]
INPUT required_checks = ["test (3.11)","test (3.12)"]
INPUT required_checks_source = "protected registry + GitHub applied rules (env/request)"
INPUT reviewer_login = "ifuri-validator-agent[bot]"
INPUT semantic_review_assessment = {"schema":"subactor.validator/semantic-review-assessment/v1","subject":{"repository":"autogrammar/nlp2cmd","pull_request":10,"head_sha":"ca80e9918dec70547638f406db04719c7bd0ac11","base_sha":"b6b1c2060eb9d1372ff20ad87ced2d9ac3ee156f","diff_sha256":"e129bd3f1b6930c9955a5da187e0070499a1c744073f7b755549b21f30fe533e"},"policy":{"policy_schema":"subactor.validator/semantic-review-policy/v1","policy_version":1,"policy_sha256":"676cb4516bbfed2a000e40b9b1b6e4a430ecc761ec546aeb53d721a1905cfdd7","required":false,"critical_paths":[],"observed_paths":["pyproject.toml"]},"grounding":"full-diff-not-per-finding-proof","execution_authority":false,"status":"not_required","reason":null,"review_sha256":null,"unresolved":[]}
INPUT superseded_checks = []
INPUT ticket_radar_receipt = {"schema":"subactor.ticket-radar/v1","base_sha":"b6b1c2060eb9d1372ff20ad87ced2d9ac3ee156f","head_sha":"ca80e9918dec70547638f406db04719c7bd0ac11","change_digest":"4df57f4d32fc72eef5839ce1545499458342d0b1c7b2e458cdfdc2d044fbe7b2","score":32,"complexity":"M","estimated_minutes":33,"split_recommended":true,"services":[],"authority":"ADVISORY","promotion":"FORBIDDEN"}
VERDICT APPROVE AUTHORITY DETERMINISTIC
REJECTED REQUEST_CHANGES BECAUSE NO_UNSAFE_CHANGE_REASON_FOUND
ADVISORY llm_verdict = "" MODEL "openrouter/z-ai/glm-5.3-flash"
ASSERT VERDICT_AUTHORITY != "ADVISORY"