[P1] Report data model (Pydantic SSOT in base.py)

[thorwhalen]

Define the Report model — the single contract between the widget and the backend.

• Report: id, created_at, category (bug|feature|question|other), title, body, page_url, env, screenshot_ref?, console?(opt-in), network?(opt-in), identity, origin, status
• Identity: anon_id (default) + optional user; client IP used transiently for rate-limiting only, never stored as an id
• Status enum: received → triaged → open(planned→started→completed) | declined | duplicate(of=…)
• Environment / LogEntry / NetEntry submodels

Pydantic v2; module docstring (D100). Design: misc/docs/design.md (Data model) · Rationale: #1

[thorwhalen]

Delivered in #10 (Phase 1): the full Pydantic SSOT in heed/base.py — Report/ReportSubmission/Identity/Environment/Category/Status/Attachment/LogEntry/NetEntry, with the server-owns-id/created_at/identity/status split and JSON round-trip tests. Closing.