fix(aidd-context): make 10-learn's recommendation step consistent

[blafourcade]

🎯 What & why

The 10-learn confirm step rendered differently every run (full table, bare list, or a question with nothing shown first) and sometimes proposed learnings outside the current PR or logged a fixed bug as a decision.

🛠️ How it works

• assess always fills a fixed recommendation-table.md asset (Packet/Score/Destination/Reconciliation, one bare value per cell, no parentheses or invented text) before asking approve/modify/skip — never the reverse.
• gather-protocol.md drops signals outside the source's scope and bugs already fixed without an explicit request to remember them — the two behaviors fix(aidd learn): Inconstancy et bypass user demande #561 actually reported.
• destinations.md gains a contract case (amend an existing project contract file directly, e.g. skill-authoring.md) and reconciliation gains retracts (remove, no replacement), each with a real apply rule and a matching review-protocol.md check.
• write-report.md gives 04-write a fixed add/modify/remove report, reusing the emoji convention already used in 01-plan's phase-template.md.
• Dedup pass: removed rules restated in two homes (transversal vs reference, action Test vs reference row), merged a near-duplicate rule destination row, and closed a gap where assess never actually emitted a source scope for gather to filter against — the scope-drop rule above was silently inert without it.

Verified end to end with headless claude -p runs (real diff as source, missing source, no-candidate source, format-consistency across two different source kinds) and live interactive runs after each fix. Two things stayed out of scope on purpose: the model narrating its Gather reasoning before the table, and occasionally pausing between actions instead of running the whole flow in one pass — both look like harness-level turn behavior (the exact same router boilerplate is used verbatim by 11 other skills in this repo), not something a skill markdown file can reliably suppress.

🧪 How to verify

• node scripts/check-markdown-links.js — 0 broken.
• make reload PLUGIN=aidd-context && claude -p "/aidd-context:10-learn diff" on a branch with real changes — confirm rec table shows before any question, bare cell values, correct destination.

⚠️ Heads-up

• Gather's narration and the occasional stop between actions are accepted as a harness-level limitation, not fixed here (see above).
• plugins/aidd-context/CATALOG.md is auto-regenerated as part of this diff (two new assets).

🔗 Linked issue

Closes #561

✅ I certify

• I DO CERTIFY I READ EACH LINE OF THE PULL REQUEST BECAUSE I AM A SOFTWARE ENGINEER, NOT A AI PUPPY.