docs: soften POSITIONING verbatim claim + add token-frugal to PyPI summary

Cross-AI review (Codex P3) caught that .planning/POSITIONING.md claimed
'Use verbatim in: glama.json / server.json' while the actual descriptions
deliberately vary by surface (long marketing form vs medium vs PyPI-short).
Fix: split into two lists — surfaces that use the sentence verbatim
(README hero, GitHub About, launch post, talk bio) vs surfaces that adapt
for length but preserve the three key phrases.

Also: add 'token-frugal' to pyproject.toml description so all four
machine-read positioning surfaces carry the full anchor consistently.
Prior Claude reviewer had flagged this as deferrable to PR #3; folding
it in here makes POSITIONING.md's new 'preserve all three key phrases'
contract internally consistent.

Char count: pyproject.toml description = 154 chars (under PyPI's 512 limit).
Key-phrase coverage verified: 3 phrases x 4 surfaces = 12/12 present.

Author: ayhammouda

.planning/POSITIONING.md

@@ -4,11 +4,17 @@
 
 > For AI coding agents writing Python, python-docs-mcp-server is the canonical Python stdlib oracle: exact symbols, exact sections, exact versions — offline, **always free, always MIT**, token-frugal.
 
-**Use verbatim in:**
+**Use verbatim (no rewording) in:**
 
 - `README.md` hero
-- `glama.json` `description`
-- `server.json` `description`
 - GitHub repo `About` text
 - `LAUNCH-POST.md` lede
 - Talk bio
+
+**Adapt for length and grammar in (preserve key phrases: `canonical Python stdlib oracle`, `always free, always MIT`, `token-frugal`):**
+
+- `glama.json` `description` — long marketing form (Glama directory display)
+- `server.json` `description` — medium form (MCP Registry display)
+- `pyproject.toml` `description` — short form (PyPI summary, ≤512 chars)
+
+The locked sentence is the anchor; adapted forms must keep the three key phrases and the wedge claim (canonical / version-aware / offline). They may drop "exact symbols, exact sections, exact versions" for brevity if needed, but never the three anchors above.

pyproject.toml

@@ -5,7 +5,7 @@ build-backend = "hatchling.build"
 [project]
 name = "python-docs-mcp-server"
 version = "0.1.4"
-description = "The canonical Python stdlib oracle for AI coding agents — exact symbols, exact sections, exact versions, offline, always free, always MIT."
+description = "The canonical Python stdlib oracle for AI coding agents — exact symbols, exact sections, exact versions, offline, always free, always MIT, token-frugal."
 readme = "README.md"
 license = "MIT"
 requires-python = ">=3.12"