Fix grammar: missing article in R07 Long-running Execution Card

[lunar-me]

Summary

This PR fixes a grammar issue in kernel/Cards/R07 Long-running Execution Card.md (line 56).

Problem

Missing article "a" before the singular countable noun phrase "resumable state".

The problematic text:

a vague "continue improving" is not resumable state.

Fix

Replaced with:

a vague "continue improving" is not a resumable state.

Type of Change

• Documentation fix (grammar, spelling, logical error)
• Code change
• Breaking change

Checklist

• Documentation files only
• No code changes
• Fix verified against original text

[KimGLee]

Thank you for catching the missing article. The wording is not a resumable state is grammatically correct and clearer than the current sentence.

Review outcome: this PR should not be merged independently in its current form.

The problem is the authority layer rather than the English correction itself. R07 is a compiled Runtime Card and explicitly states Compiled kernel guidance. Do not hand-edit. Cambium governance requires Card text to be regenerated from its authoritative Kernel sources during a write-back, rather than allowing a Card-only edit.

The current checks can still pass because the Card stamp verifies the declared source hashes; it does not prove that a manual prose edit was regenerated from those sources. Merging this PR alone would therefore establish the wrong maintenance pattern.

Please fold this wording correction into the legitimate R07 regeneration required by PR #72, then mark this PR as superseded. That preserves the valid correction without creating a Card-only authority drift.

For future contributions, please open an Issue first so that the problem and correct authority layer can be reviewed before implementation. Then open a linked PR using a reference such as Closes #<issue-number>. This makes related changes easier to consolidate and keeps the governance history traceable.