docs: trim repeated boilerplate in git, gitea, and bin skills

Finding 13: five blocks of near-identical wording were repeated across
skills within a plugin — the gitea "resolve owner and repo" step (5
skills), the 404-masks-403 note (6 files), the manual pagination
explanation (8 files), the git plugin's main/master force-push refusal
(7 files, some with multiple internal restatements), and the bin
skills' domain-glossary/ADR paragraph (5 skills). Tightened each
instance in place — same meaning, fewer words — rather than extracting
to a shared file, which ADR-0014's one-file-per-skill install
constraint rules out. Left the three git skills' structured-result
JSON shapes alone (coupled to the separate, out-of-scope git-orchestrate
merge candidate, finding 19).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YR2CjVumUbEGWcMikcoXBD

plugins/bin/.apm/skills/diagnose/SKILL.md

@@ -5,14 +5,14 @@ description: >
   broken, throwing, or failing, or says something got slow. Not filing or
   triaging a reported bug -> `triage`. Not test-first feature work -> `tdd`.
 metadata:
-  version: "1.0.0"
+  version: "1.0.1"
 ---
 
 # Diagnose
 
 A discipline for hard bugs. Skip phases only when explicitly justified.
 
-When exploring the codebase, use the project's domain glossary to get a clear mental model of the relevant modules, and check ADRs in the area you're touching.
+When exploring the codebase, use the domain glossary for a clear mental model of the relevant modules, and check ADRs in the area.
 
 ## Phase 1 — Build a feedback loop