fix(licence): correct 3 residual sweep lines left after #49 (#55)

Follow-up to #49 (merged at `0c0c2e8`). Three residual sweep lines —
among the "12" you flagged in #49 — were not corrected before merge, so
they are currently live on `main`. This applies the corrections you
approved (per-file, owner-sanctioned).

| | File | Correction | Why |
|---|---|---|---|
| **A** | `LICENSE` | `http://mozilla.org/MPL/2.0/` → `https://…` (+
drop a stray trailing space) | Estate "HTTPS only" — the sweep had
downgraded the canonical MPL URL. |
| **B** | `PALIMPSEST.adoc` | "Add SPDX headers to **source files**:
`…CC-BY-SA-4.0`" → `MPL-2.0` | Source files take MPL-2.0; the sweep had
told readers to put a prose licence on source. File **header** stays
`CC-BY-SA-4.0` (correct for a doc). |
| **C** | `RSR_OUTLINE.adoc` | in-body "`== License` → `CC-BY-SA-4.0`" →
`MPL-2.0` | States the template's **own** licence (MPL-2.0). The prior
`MPL-2.0-or-later` isn't a valid SPDX id, so restored to canonical
`MPL-2.0`. File **header** stays `CC-BY-SA-4.0`. |

Net: 3 files, +4/−4. No SPDX **header** changed; no vendored/upstream
path touched; no relicensing — these revert sweep collateral back to the
repo's own classification.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

https://claude.ai/code/session_01WN6nPWWe4dvXfoqBG6auWN

---
_Generated by [Claude
Code](https://claude.ai/code/session_01WN6nPWWe4dvXfoqBG6auWN)_

Co-authored-by: Claude <noreply@anthropic.com>

Author: hyperpolymath

LICENSE

@@ -35,7 +35,7 @@ Mozilla Public License Version 2.0
     means any form of the work other than Source Code Form.
 
 1.7. "Larger Work"
-    means a work that combines Covered Software with other material, in 
+    means a work that combines Covered Software with other material, in
     a separate file or files, that is not Covered Software.
 
 1.8. "License"
@@ -357,7 +357,7 @@ Exhibit A - Source Code Form License Notice
 
   This Source Code Form is subject to the terms of the Mozilla Public
   License, v. 2.0. If a copy of the MPL was not distributed with this
-  file, You can obtain one at http://mozilla.org/MPL/2.0/.
+  file, You can obtain one at https://mozilla.org/MPL/2.0/.
 
 If it is not possible or desirable to put the notice in a particular
 file, then You may include the notice in a location (such as a LICENSE

PALIMPSEST.adoc

@@ -28,7 +28,7 @@ ethical-use, provenance, and lineage requirements.
 
 1. Include the MPL-2.0 license text in `LICENSE`.
 2. Add SPDX headers to source files:
-   `SPDX-License-Identifier: CC-BY-SA-4.0`
+   `SPDX-License-Identifier: MPL-2.0`
 3. Add a Palimpsest badge to your README (see `assets/badges/` and `embed/license-blocks/`).
 
 == Versioning

RSR_OUTLINE.adoc

@@ -211,7 +211,7 @@ This template is part of:
 
 == License
 
-SPDX-License-Identifier: CC-BY-SA-4.0
+SPDX-License-Identifier: MPL-2.0
 
 == Links