docs: fix README + CLAUDE.md facts not covered by #309

[saadqbal]

Summary

Follow-on to #309 (merged), which corrected the README's Python floor, added token_classification, and rewrote the custom-processor example for v0.4.0. I'd independently audited the README and fixed the same items — this PR is now trimmed to only the stale facts #309 did not touch:

Readme.md

• BaseProcessor → BaseIngestor (line 99) — there is no BaseProcessor class.
• Exports sentence now also lists run_ingestion + Config — consistent with the example docs(readme): correct stale facts after the v0.4.0 refactor #309 added (which imports both).

CLAUDE.md (not touched by #309)

• Python 3.8+ → 3.11+ (matches setup.py python_requires=">=3.11").
• Dev install requirements.txt → requirements-dev.txt — the runtime/dev split landed in refactor(packaging): split runtime vs dev requirements; declare numpy #246, so requirements.txt is runtime-only.

Test plan

Docs-only. Verified BaseIngestor / run_ingestion / Config are top-level exports (__all__), and requirements-dev.txt pulls in runtime via -r requirements.txt.

Closes #311

🤖 Generated with Claude Code

[LukasWodka]

👋 Heads-up — Code review queue is at 41 / 30

Above the WIP limit. The team convention is to review existing PRs before opening new work.

Open PRs currently in Code review (oldest first):

• .github#57 — fix(fr-gate): pass items at or beyond the required stage · author: @aptracebloc · no reviewer assigned
• .github#60 — feat(security): public-repo PII gate (block customer names + secrets in PRs) · author: @LukasWodka · no reviewer assigned
• .github#61 — fix(wip-limit): avoid sort|head SIGPIPE failing the WIP check when queue >10 · author: @shujaatTracebloc · reviewer: @saadqbal
• averaging-service#117 — refactor(averaging): per-framework weight-handling seam (WS-B B1) · author: @divyasinghds · no reviewer assigned
• averaging-service#118 — feat(averaging): trainable-only keyed-dict weight format (WS-C image_validator falsely rejects images when target_size matches exactly #104) · author: @divyasinghds · no reviewer assigned
• averaging-service#119 — fix(averaging): exact federated GaussianNB merge — usable + correct (WS-B B2, docs: fix staging-recipe link branch ref (main → develop) #112) · author: @divyasinghds · no reviewer assigned
• backend#815 — chore(deps): bump cryptography from 47.0.0 to 48.0.1 · author: @dependabot · no reviewer assigned
• backend#833 — fix(deploy): graceful shutdown + Dockerfile hygiene; drop dead EC2 script · author: @LukasWodka · no reviewer assigned
• backend#840 — feat(rfc-0001): namespace-slug rule + validation command (#837) · author: @LukasWodka · no reviewer assigned
• backend#843 — fix(test): connect local MySQL test DB over TCP + document mac test-tier setup · author: @LukasWodka · reviewer: @saadqbal

Pull from review before opening new work. (This is a nudge from the kanban WIP check, not a block.)