chore: extend [SYSTEM:→[IMPORTANT: rename + AUTHOR_MAP

Follow-up to #6616 covering the remaining user-injected prompt markers that
the original PR did not touch (reporter's second comment on #6576 explicitly
flagged these). Azure OpenAI Default/DefaultV2 content filters treat any
bracketed [SYSTEM: ...] as prompt-injection and reject with HTTP 400.

Remaining call sites renamed:
- cli.py: background-process notifications (watch_disabled, watch_match,
  completion), MCP reload notice (4 live + 1 docstring)
- gateway/run.py: same notification paths + auto-loaded skill banner +
  MCP reload notice (5 live + 1 docstring)
- tools/process_registry.py: comment reference

Not renamed:
- environments/hermes_base_env.py '[SYSTEM]\n{content}' — RL training
  trajectory rendering only, never sent to Azure, part of a symmetric
  [USER]/[ASSISTANT]/[TOOL] scheme.

AUTHOR_MAP: buraysandro9@gmail.com -> ygd58.

scripts/release.py

@@ -119,6 +119,7 @@ AUTHOR_MAP = {
     "nocoo@users.noreply.github.com": "nocoo",
     "30841158+n-WN@users.noreply.github.com": "n-WN",
     "tsuijinglei@gmail.com": "hiddenpuppy",
+    "buraysandro9@gmail.com": "ygd58",
     "jerome@clawwork.ai": "HiddenPuppy",
     "jerome.benoit@sap.com": "jerome-benoit",
     "wysie@users.noreply.github.com": "Wysie",