chore(server): bump REST API version

[imbajin]

Before → after

HugeGraph 1.7 and current master both reported REST API 0.71, even though
master added the default-role APIs used by Hubble permission presets.

Master now exposes a consistent 0.72 contract from source through the final
Docker image:

• version.properties: ApiVersion=0.72
• API JAR manifest: Implementation-Version: 0.72.0.0
• ApiVersion change log: GraphSpace default-role management APIs
• Server Docker builds install the current reactor artifacts before assembly
• Maven build caches are locked and isolated by source revision
• Docker CI compares the packaged API/common versions with their source values

Clients can distinguish released 1.7 from master through /versions, without
probing privileged endpoints or branching on the core version.

Verification

• Java 11 reactor build passed.
• Standalone Docker image returned /versions.api = 0.72.0.0.
• Packaged API JAR manifest returned 0.72.0.0.
• Packaged common JAR contained ApiVersion=0.72.
• Both Server Dockerfiles passed BuildKit static checks.
• actionlint and git diff --check passed.
• Three independent correctness/design/security reviews found no remaining
  high or medium finding.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 1.53%. Comparing base (431f6e6) to head (88a762a).

❗ There is a different number of reports uploaded between BASE (431f6e6) and HEAD (88a762a). Click for more details.

HEAD has 4 uploads less than BASE

Flag	BASE (431f6e6)	HEAD (88a762a)
	5	1

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #3159       +/-   ##
============================================
- Coverage     41.06%   1.53%   -39.53%     
+ Complexity      519      21      -498     
============================================
  Files           771     749       -22     
  Lines         65962   63447     -2515     
  Branches       8766    8318      -448     
============================================
- Hits          27088     975    -26113     
- Misses        36008   62388    +26380     
+ Partials       2866      84     -2782     

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