chore(spec): flip all stale [pending] task statuses to [completed] (#298)

[MScottAdams]

Summary

Flip all 24 stale [pending] spec task statuses to [completed] in SPECIFICATION.md.

Closes #298

What Changed

Full audit of SPECIFICATION.md against CHANGELOG.md and ROADMAP.md identified 24 tasks showing [pending] that shipped in prior releases but were never synced:

• v0.14.0 (11 tasks): t3.1.1, t3.1.2, t3.1.3, t2.7.1--t2.7.8
• v0.16.0 (5 tasks): t1.14.1, t1.15.1, t1.18.1, t1.19.1, t1.20.1
• v0.17.0 (3 tasks): t3.3.1, t3.3.2, t3.3.3
• v0.18.0 (5 tasks): t1.21.1, t1.22.1, t1.23.1, t1.24.1, t2.11.1

Also filled t1.25.1 acceptance criterion and flipped it to [completed].

No task body content was changed -- only heading status markers edited.

Checklist

• SPECIFICATION.md has task coverage (t1.25.1)
• CHANGELOG.md has entry under [Unreleased]
• task check passes
• /deft:change proposal: N/A (2-file docs-only change)

[MScottAdams]

@greptileai review

[greptile-apps]

Greptile Summary

This PR performs a spec status audit, flipping 24 stale [pending] task headings to [completed] in SPECIFICATION.md for tasks that shipped across v0.14.0–v0.18.0 but were never synced. It also adds the t1.25.1 task entry with filled acceptance criteria and flips it to [completed], and adds the corresponding [Unreleased] CHANGELOG entry.

All 24 named task IDs were verified as [completed] in SPECIFICATION.md. The two remaining [pending] tasks (t2.9.1, t3.3.4) are correctly left untouched as unshipped work.

Confidence Score: 5/5

Safe to merge — documentation-only change with accurate, verified status updates and no task body edits.

All 24 stale task IDs confirmed as [completed] in SPECIFICATION.md; t1.25.1 acceptance criteria are well-formed; CHANGELOG entry is accurate; the two remaining [pending] tasks are correctly untouched. No logic, schema, or code changes — purely doc sync.

No files require special attention.

Important Files Changed

Filename	Overview
SPECIFICATION.md	25 heading status markers flipped from [pending] to [completed] (24 stale + t1.25.1); t1.25.1 acceptance criteria filled; no task body content changed; two legitimately unshipped tasks (t2.9.1, t3.3.4) correctly remain [pending]
CHANGELOG.md	Added [Unreleased] ### Fixed entry accurately listing all 24 flipped task IDs grouped by release; pre-existing Roadmap Refresh ### Changed entry (from prior commit) describes the original 5-task triage scope, which is a historical record and not an error

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[Full audit: SPECIFICATION.md vs CHANGELOG.md + ROADMAP.md] --> B{Task shipped in prior release?}
    B -- Yes --> C[Flip status to completed]
    B -- No --> D[Leave as pending]
    C --> E[24 tasks flipped across 4 releases]
    D --> F[2 tasks remain pending: t2.9.1 and t3.3.4]
    E --> G[t1.25.1 acceptance criteria filled and flipped to completed]
    G --> H[CHANGELOG.md Fixed entry added under Unreleased]

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