docs(prd): dated roadmap leaf — Gantt, milestone spine, re-baselining rule

New roadmap.md: mermaid Gantt (validated) putting the six phases on
calendar time from baseline 2026-07-11 — P2 e-invoicing opens the plan
(ADR D4 target 08-14, two-week fallback before the hard 09-01), P1
flagship in parallel (golden set first, A2 earned ~10-09), ledger-
compliance verifications early September (FY-2026 FEC depends on the
accounting-module answer), P3 standing fleet through autumn (sentinel
24/7 ~11-13), P4 money-loop exit over December, P5 riding the fiscal
calendar (acompte 12-15, CA3 switch 01-01, Q1 filing April, CA12 early
May, AG 06-30), P6 e-reporting proven months before 2027-09-01.
Immovable-milestone table, dependency notes, re-baselining rule
(engineering bars slide, diamonds don't — slips shed scope instead).
Wired: hub pointer + leaves row, poc-plan/STATUS backlinks.

Co-Authored-By: Claude Fable 5 <[email protected]>
This commit is contained in:
2026-07-11 15:02:02 +02:00
co-authored by Claude Fable 5
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> **Status:** 🟢 Current
> **Last Updated:** 2026-07-11
> **Up:** [AI back-office hub](README.md)
> **Related:** [POC plan](poc-plan.md)
> **Related:** [POC plan](poc-plan.md) · [Roadmap](roadmap.md) (dated plan; actuals and slips land here)
## Phase tracker